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Commit | Line | Data |
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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> | |
1da177e4 | 36 | #include <linux/dirent.h> |
0eeca283 | 37 | #include <linux/fsnotify.h> |
1da177e4 | 38 | #include <linux/highuid.h> |
1da177e4 LT |
39 | #include <linux/personality.h> |
40 | #include <linux/rwsem.h> | |
8f0ab514 | 41 | #include <linux/tsacct_kern.h> |
6272e266 | 42 | #include <linux/security.h> |
a1f8e7f7 | 43 | #include <linux/highmem.h> |
6d18c922 | 44 | #include <linux/signal.h> |
bd01f843 | 45 | #include <linux/poll.h> |
4a805e86 | 46 | #include <linux/mm.h> |
498052bb | 47 | #include <linux/fs_struct.h> |
5a0e3ad6 | 48 | #include <linux/slab.h> |
504b701b | 49 | #include <linux/pagemap.h> |
1da177e4 | 50 | |
1da177e4 LT |
51 | #include <asm/uaccess.h> |
52 | #include <asm/mmu_context.h> | |
53 | #include <asm/ioctls.h> | |
07f3f05c | 54 | #include "internal.h" |
9f72949f | 55 | |
bebfa101 AK |
56 | int compat_log = 1; |
57 | ||
58 | int compat_printk(const char *fmt, ...) | |
59 | { | |
60 | va_list ap; | |
61 | int ret; | |
62 | if (!compat_log) | |
63 | return 0; | |
64 | va_start(ap, fmt); | |
65 | ret = vprintk(fmt, ap); | |
66 | va_end(ap); | |
67 | return ret; | |
68 | } | |
69 | ||
ee0b3e67 BP |
70 | #include "read_write.h" |
71 | ||
1da177e4 LT |
72 | /* |
73 | * Not all architectures have sys_utime, so implement this in terms | |
74 | * of sys_utimes. | |
75 | */ | |
c7887325 DH |
76 | asmlinkage long compat_sys_utime(const char __user *filename, |
77 | struct compat_utimbuf __user *t) | |
1da177e4 | 78 | { |
1c710c89 | 79 | struct timespec tv[2]; |
1da177e4 LT |
80 | |
81 | if (t) { | |
82 | if (get_user(tv[0].tv_sec, &t->actime) || | |
83 | get_user(tv[1].tv_sec, &t->modtime)) | |
84 | return -EFAULT; | |
1c710c89 UD |
85 | tv[0].tv_nsec = 0; |
86 | tv[1].tv_nsec = 0; | |
1da177e4 | 87 | } |
1c710c89 UD |
88 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
89 | } | |
90 | ||
c7887325 | 91 | asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags) |
1c710c89 UD |
92 | { |
93 | struct timespec tv[2]; | |
94 | ||
95 | if (t) { | |
96 | if (get_compat_timespec(&tv[0], &t[0]) || | |
97 | get_compat_timespec(&tv[1], &t[1])) | |
98 | return -EFAULT; | |
99 | ||
1c710c89 UD |
100 | if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT) |
101 | return 0; | |
102 | } | |
103 | return do_utimes(dfd, filename, t ? tv : NULL, flags); | |
1da177e4 LT |
104 | } |
105 | ||
c7887325 | 106 | asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t) |
1da177e4 | 107 | { |
1c710c89 | 108 | struct timespec tv[2]; |
1da177e4 | 109 | |
9ad11ab4 | 110 | if (t) { |
1da177e4 | 111 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
1c710c89 | 112 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
1da177e4 | 113 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
1c710c89 | 114 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
9ad11ab4 | 115 | return -EFAULT; |
1c710c89 UD |
116 | if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 || |
117 | tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0) | |
118 | return -EINVAL; | |
119 | tv[0].tv_nsec *= 1000; | |
120 | tv[1].tv_nsec *= 1000; | |
9ad11ab4 | 121 | } |
1c710c89 | 122 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
5590ff0d UD |
123 | } |
124 | ||
c7887325 | 125 | asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t) |
5590ff0d UD |
126 | { |
127 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
128 | } |
129 | ||
f7a5000f CH |
130 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
131 | { | |
fcf83067 | 132 | struct compat_stat tmp; |
f7a5000f | 133 | |
fcf83067 AV |
134 | if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) |
135 | return -EOVERFLOW; | |
f7a5000f | 136 | |
fcf83067 AV |
137 | memset(&tmp, 0, sizeof(tmp)); |
138 | tmp.st_dev = old_encode_dev(stat->dev); | |
139 | tmp.st_ino = stat->ino; | |
140 | if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) | |
f7a5000f | 141 | return -EOVERFLOW; |
fcf83067 AV |
142 | tmp.st_mode = stat->mode; |
143 | tmp.st_nlink = stat->nlink; | |
144 | if (tmp.st_nlink != stat->nlink) | |
f7a5000f | 145 | return -EOVERFLOW; |
a7c1938e EB |
146 | SET_UID(tmp.st_uid, from_kuid_munged(current_user_ns(), stat->uid)); |
147 | SET_GID(tmp.st_gid, from_kgid_munged(current_user_ns(), stat->gid)); | |
fcf83067 AV |
148 | tmp.st_rdev = old_encode_dev(stat->rdev); |
149 | if ((u64) stat->size > MAX_NON_LFS) | |
150 | return -EOVERFLOW; | |
151 | tmp.st_size = stat->size; | |
152 | tmp.st_atime = stat->atime.tv_sec; | |
153 | tmp.st_atime_nsec = stat->atime.tv_nsec; | |
154 | tmp.st_mtime = stat->mtime.tv_sec; | |
155 | tmp.st_mtime_nsec = stat->mtime.tv_nsec; | |
156 | tmp.st_ctime = stat->ctime.tv_sec; | |
157 | tmp.st_ctime_nsec = stat->ctime.tv_nsec; | |
158 | tmp.st_blocks = stat->blocks; | |
159 | tmp.st_blksize = stat->blksize; | |
160 | return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
f7a5000f CH |
161 | } |
162 | ||
c7887325 | 163 | asmlinkage long compat_sys_newstat(const char __user * filename, |
1da177e4 LT |
164 | struct compat_stat __user *statbuf) |
165 | { | |
166 | struct kstat stat; | |
2eae7a18 | 167 | int error; |
1da177e4 | 168 | |
2eae7a18 CH |
169 | error = vfs_stat(filename, &stat); |
170 | if (error) | |
171 | return error; | |
172 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
173 | } |
174 | ||
c7887325 | 175 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
1da177e4 LT |
176 | struct compat_stat __user *statbuf) |
177 | { | |
178 | struct kstat stat; | |
2eae7a18 | 179 | int error; |
1da177e4 | 180 | |
2eae7a18 CH |
181 | error = vfs_lstat(filename, &stat); |
182 | if (error) | |
183 | return error; | |
184 | return cp_compat_stat(&stat, statbuf); | |
1da177e4 LT |
185 | } |
186 | ||
82d821dd | 187 | #ifndef __ARCH_WANT_STAT64 |
c7887325 DH |
188 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
189 | const char __user *filename, | |
5590ff0d UD |
190 | struct compat_stat __user *statbuf, int flag) |
191 | { | |
192 | struct kstat stat; | |
0112fc22 | 193 | int error; |
5590ff0d | 194 | |
0112fc22 OD |
195 | error = vfs_fstatat(dfd, filename, &stat, flag); |
196 | if (error) | |
197 | return error; | |
198 | return cp_compat_stat(&stat, statbuf); | |
5590ff0d | 199 | } |
82d821dd | 200 | #endif |
5590ff0d | 201 | |
1da177e4 LT |
202 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
203 | struct compat_stat __user * statbuf) | |
204 | { | |
205 | struct kstat stat; | |
206 | int error = vfs_fstat(fd, &stat); | |
207 | ||
208 | if (!error) | |
209 | error = cp_compat_stat(&stat, statbuf); | |
210 | return error; | |
211 | } | |
212 | ||
213 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
214 | { | |
215 | ||
216 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
217 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
218 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
219 | return -EOVERFLOW; |
220 | /* f_files and f_ffree may be -1; it's okay | |
221 | * to stuff that into 32 bits */ | |
222 | if (kbuf->f_files != 0xffffffffffffffffULL | |
223 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
224 | return -EOVERFLOW; | |
225 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
226 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
227 | return -EOVERFLOW; | |
228 | } | |
229 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
230 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
231 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
232 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
233 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
234 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
235 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
236 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
237 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
238 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
239 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
240 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
1448c721 EB |
241 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
242 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) | |
1da177e4 LT |
243 | return -EFAULT; |
244 | return 0; | |
245 | } | |
246 | ||
247 | /* | |
974d879e | 248 | * The following statfs calls are copies of code from fs/statfs.c and |
1da177e4 LT |
249 | * should be checked against those from time to time |
250 | */ | |
2d8f3038 | 251 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
1da177e4 | 252 | { |
c8b91acc AV |
253 | struct kstatfs tmp; |
254 | int error = user_statfs(pathname, &tmp); | |
255 | if (!error) | |
256 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
257 | return error; |
258 | } | |
259 | ||
260 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
261 | { | |
1da177e4 | 262 | struct kstatfs tmp; |
c8b91acc | 263 | int error = fd_statfs(fd, &tmp); |
86e07ce7 DG |
264 | if (!error) |
265 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
266 | return error; |
267 | } | |
268 | ||
269 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
270 | { | |
271 | if (sizeof ubuf->f_blocks == 4) { | |
f4a67cce JT |
272 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
273 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) | |
1da177e4 LT |
274 | return -EOVERFLOW; |
275 | /* f_files and f_ffree may be -1; it's okay | |
276 | * to stuff that into 32 bits */ | |
277 | if (kbuf->f_files != 0xffffffffffffffffULL | |
278 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
279 | return -EOVERFLOW; | |
280 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
281 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
282 | return -EOVERFLOW; | |
283 | } | |
284 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
285 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
286 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
287 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
288 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
289 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
290 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
291 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
292 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
293 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
294 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
e0bb6bda NK |
295 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
296 | __put_user(kbuf->f_flags, &ubuf->f_flags) || | |
297 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) | |
1da177e4 LT |
298 | return -EFAULT; |
299 | return 0; | |
300 | } | |
301 | ||
2d8f3038 | 302 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
1da177e4 | 303 | { |
c8b91acc | 304 | struct kstatfs tmp; |
1da177e4 LT |
305 | int error; |
306 | ||
307 | if (sz != sizeof(*buf)) | |
308 | return -EINVAL; | |
309 | ||
c8b91acc AV |
310 | error = user_statfs(pathname, &tmp); |
311 | if (!error) | |
312 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
313 | return error; |
314 | } | |
315 | ||
316 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
317 | { | |
1da177e4 LT |
318 | struct kstatfs tmp; |
319 | int error; | |
320 | ||
321 | if (sz != sizeof(*buf)) | |
322 | return -EINVAL; | |
323 | ||
c8b91acc | 324 | error = fd_statfs(fd, &tmp); |
86e07ce7 DG |
325 | if (!error) |
326 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
327 | return error; |
328 | } | |
329 | ||
2b1c6bd7 CH |
330 | /* |
331 | * This is a copy of sys_ustat, just dealing with a structure layout. | |
332 | * Given how simple this syscall is that apporach is more maintainable | |
333 | * than the various conversion hacks. | |
334 | */ | |
335 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) | |
336 | { | |
2b1c6bd7 CH |
337 | struct compat_ustat tmp; |
338 | struct kstatfs sbuf; | |
cf31e70d | 339 | int err = vfs_ustat(new_decode_dev(dev), &sbuf); |
2b1c6bd7 CH |
340 | if (err) |
341 | return err; | |
342 | ||
343 | memset(&tmp, 0, sizeof(struct compat_ustat)); | |
344 | tmp.f_tfree = sbuf.f_bfree; | |
345 | tmp.f_tinode = sbuf.f_ffree; | |
346 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) | |
347 | return -EFAULT; | |
348 | return 0; | |
349 | } | |
350 | ||
1da177e4 LT |
351 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
352 | { | |
353 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
354 | __get_user(kfl->l_type, &ufl->l_type) || | |
355 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
356 | __get_user(kfl->l_start, &ufl->l_start) || | |
357 | __get_user(kfl->l_len, &ufl->l_len) || | |
358 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
359 | return -EFAULT; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
364 | { | |
365 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
366 | __put_user(kfl->l_type, &ufl->l_type) || | |
367 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
368 | __put_user(kfl->l_start, &ufl->l_start) || | |
369 | __put_user(kfl->l_len, &ufl->l_len) || | |
370 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
371 | return -EFAULT; | |
372 | return 0; | |
373 | } | |
374 | ||
375 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
376 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
377 | { | |
378 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
379 | __get_user(kfl->l_type, &ufl->l_type) || | |
380 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
381 | __get_user(kfl->l_start, &ufl->l_start) || | |
382 | __get_user(kfl->l_len, &ufl->l_len) || | |
383 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
384 | return -EFAULT; | |
385 | return 0; | |
386 | } | |
387 | #endif | |
388 | ||
389 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
390 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
391 | { | |
392 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
393 | __put_user(kfl->l_type, &ufl->l_type) || | |
394 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
395 | __put_user(kfl->l_start, &ufl->l_start) || | |
396 | __put_user(kfl->l_len, &ufl->l_len) || | |
397 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
398 | return -EFAULT; | |
399 | return 0; | |
400 | } | |
401 | #endif | |
402 | ||
403 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
404 | unsigned long arg) | |
405 | { | |
406 | mm_segment_t old_fs; | |
407 | struct flock f; | |
408 | long ret; | |
409 | ||
410 | switch (cmd) { | |
411 | case F_GETLK: | |
412 | case F_SETLK: | |
413 | case F_SETLKW: | |
414 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
415 | if (ret != 0) | |
416 | break; | |
417 | old_fs = get_fs(); | |
418 | set_fs(KERNEL_DS); | |
419 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
420 | set_fs(old_fs); | |
421 | if (cmd == F_GETLK && ret == 0) { | |
ff677f8d | 422 | /* GETLK was successful and we need to return the data... |
2520f14c N |
423 | * but it needs to fit in the compat structure. |
424 | * l_start shouldn't be too big, unless the original | |
425 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
426 | * case the app was asking for trouble, so we return | |
427 | * -EOVERFLOW in that case. | |
428 | * l_len could be too big, in which case we just truncate it, | |
429 | * and only allow the app to see that part of the conflicting | |
430 | * lock that might make sense to it anyway | |
431 | */ | |
432 | ||
433 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 434 | ret = -EOVERFLOW; |
2520f14c N |
435 | if (f.l_len > COMPAT_OFF_T_MAX) |
436 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
437 | if (ret == 0) |
438 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
439 | } | |
440 | break; | |
441 | ||
442 | case F_GETLK64: | |
443 | case F_SETLK64: | |
444 | case F_SETLKW64: | |
445 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
446 | if (ret != 0) | |
447 | break; | |
448 | old_fs = get_fs(); | |
449 | set_fs(KERNEL_DS); | |
450 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
451 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
452 | (unsigned long)&f); | |
453 | set_fs(old_fs); | |
454 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
455 | /* need to return lock information - see above for commentary */ |
456 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 457 | ret = -EOVERFLOW; |
2520f14c N |
458 | if (f.l_len > COMPAT_LOFF_T_MAX) |
459 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
460 | if (ret == 0) |
461 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
462 | } | |
463 | break; | |
464 | ||
465 | default: | |
466 | ret = sys_fcntl(fd, cmd, arg); | |
467 | break; | |
468 | } | |
469 | return ret; | |
470 | } | |
471 | ||
472 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
473 | unsigned long arg) | |
474 | { | |
475 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
476 | return -EINVAL; | |
477 | return compat_sys_fcntl64(fd, cmd, arg); | |
478 | } | |
479 | ||
480 | asmlinkage long | |
481 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
482 | { | |
483 | long ret; | |
484 | aio_context_t ctx64; | |
485 | ||
486 | mm_segment_t oldfs = get_fs(); | |
487 | if (unlikely(get_user(ctx64, ctx32p))) | |
488 | return -EFAULT; | |
489 | ||
490 | set_fs(KERNEL_DS); | |
491 | /* The __user pointer cast is valid because of the set_fs() */ | |
492 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
493 | set_fs(oldfs); | |
494 | /* truncating is ok because it's a user address */ | |
495 | if (!ret) | |
496 | ret = put_user((u32) ctx64, ctx32p); | |
497 | return ret; | |
498 | } | |
499 | ||
500 | asmlinkage long | |
501 | compat_sys_io_getevents(aio_context_t ctx_id, | |
502 | unsigned long min_nr, | |
503 | unsigned long nr, | |
504 | struct io_event __user *events, | |
505 | struct compat_timespec __user *timeout) | |
506 | { | |
507 | long ret; | |
508 | struct timespec t; | |
509 | struct timespec __user *ut = NULL; | |
510 | ||
511 | ret = -EFAULT; | |
512 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
513 | nr * sizeof(struct io_event)))) | |
514 | goto out; | |
515 | if (timeout) { | |
516 | if (get_compat_timespec(&t, timeout)) | |
517 | goto out; | |
518 | ||
519 | ut = compat_alloc_user_space(sizeof(*ut)); | |
520 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
521 | goto out; | |
522 | } | |
523 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
524 | out: | |
525 | return ret; | |
526 | } | |
527 | ||
b8373363 JM |
528 | /* A write operation does a read from user space and vice versa */ |
529 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) | |
530 | ||
531 | ssize_t compat_rw_copy_check_uvector(int type, | |
532 | const struct compat_iovec __user *uvector, unsigned long nr_segs, | |
533 | unsigned long fast_segs, struct iovec *fast_pointer, | |
ac34ebb3 | 534 | struct iovec **ret_pointer) |
b8373363 JM |
535 | { |
536 | compat_ssize_t tot_len; | |
537 | struct iovec *iov = *ret_pointer = fast_pointer; | |
538 | ssize_t ret = 0; | |
539 | int seg; | |
540 | ||
541 | /* | |
542 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
543 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
544 | * traditionally returned zero for zero segments, so... | |
545 | */ | |
546 | if (nr_segs == 0) | |
547 | goto out; | |
548 | ||
549 | ret = -EINVAL; | |
550 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) | |
551 | goto out; | |
552 | if (nr_segs > fast_segs) { | |
553 | ret = -ENOMEM; | |
554 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
6a5640f1 | 555 | if (iov == NULL) |
b8373363 | 556 | goto out; |
b8373363 JM |
557 | } |
558 | *ret_pointer = iov; | |
559 | ||
560 | /* | |
561 | * Single unix specification: | |
562 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
435f49a5 | 563 | * ssize_t. |
b8373363 | 564 | * |
435f49a5 LT |
565 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
566 | * no overflow possibility. | |
b8373363 JM |
567 | */ |
568 | tot_len = 0; | |
569 | ret = -EINVAL; | |
570 | for (seg = 0; seg < nr_segs; seg++) { | |
b8373363 JM |
571 | compat_uptr_t buf; |
572 | compat_ssize_t len; | |
573 | ||
574 | if (__get_user(len, &uvector->iov_len) || | |
575 | __get_user(buf, &uvector->iov_base)) { | |
576 | ret = -EFAULT; | |
577 | goto out; | |
578 | } | |
579 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ | |
580 | goto out; | |
ac34ebb3 | 581 | if (type >= 0 && |
fcf63409 | 582 | !access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
b8373363 JM |
583 | ret = -EFAULT; |
584 | goto out; | |
585 | } | |
435f49a5 LT |
586 | if (len > MAX_RW_COUNT - tot_len) |
587 | len = MAX_RW_COUNT - tot_len; | |
588 | tot_len += len; | |
b8373363 JM |
589 | iov->iov_base = compat_ptr(buf); |
590 | iov->iov_len = (compat_size_t) len; | |
591 | uvector++; | |
592 | iov++; | |
593 | } | |
594 | ret = tot_len; | |
595 | ||
596 | out: | |
597 | return ret; | |
598 | } | |
599 | ||
1da177e4 LT |
600 | static inline long |
601 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
602 | { | |
603 | compat_uptr_t uptr; | |
604 | int i; | |
605 | ||
606 | for (i = 0; i < nr; ++i) { | |
607 | if (get_user(uptr, ptr32 + i)) | |
608 | return -EFAULT; | |
609 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
610 | return -EFAULT; | |
611 | } | |
612 | return 0; | |
613 | } | |
614 | ||
615 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
616 | ||
617 | asmlinkage long | |
618 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
619 | { | |
620 | struct iocb __user * __user *iocb64; | |
621 | long ret; | |
622 | ||
623 | if (unlikely(nr < 0)) | |
624 | return -EINVAL; | |
625 | ||
626 | if (nr > MAX_AIO_SUBMITS) | |
627 | nr = MAX_AIO_SUBMITS; | |
628 | ||
629 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
630 | ret = copy_iocb(nr, iocb, iocb64); | |
631 | if (!ret) | |
9d85cba7 | 632 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
1da177e4 LT |
633 | return ret; |
634 | } | |
635 | ||
636 | struct compat_ncp_mount_data { | |
637 | compat_int_t version; | |
638 | compat_uint_t ncp_fd; | |
202e5979 | 639 | __compat_uid_t mounted_uid; |
1da177e4 LT |
640 | compat_pid_t wdog_pid; |
641 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
642 | compat_uint_t time_out; | |
643 | compat_uint_t retry_count; | |
644 | compat_uint_t flags; | |
202e5979 SR |
645 | __compat_uid_t uid; |
646 | __compat_gid_t gid; | |
1da177e4 LT |
647 | compat_mode_t file_mode; |
648 | compat_mode_t dir_mode; | |
649 | }; | |
650 | ||
651 | struct compat_ncp_mount_data_v4 { | |
652 | compat_int_t version; | |
653 | compat_ulong_t flags; | |
654 | compat_ulong_t mounted_uid; | |
655 | compat_long_t wdog_pid; | |
656 | compat_uint_t ncp_fd; | |
657 | compat_uint_t time_out; | |
658 | compat_uint_t retry_count; | |
659 | compat_ulong_t uid; | |
660 | compat_ulong_t gid; | |
661 | compat_ulong_t file_mode; | |
662 | compat_ulong_t dir_mode; | |
663 | }; | |
664 | ||
665 | static void *do_ncp_super_data_conv(void *raw_data) | |
666 | { | |
667 | int version = *(unsigned int *)raw_data; | |
668 | ||
669 | if (version == 3) { | |
670 | struct compat_ncp_mount_data *c_n = raw_data; | |
671 | struct ncp_mount_data *n = raw_data; | |
672 | ||
673 | n->dir_mode = c_n->dir_mode; | |
674 | n->file_mode = c_n->file_mode; | |
675 | n->gid = c_n->gid; | |
676 | n->uid = c_n->uid; | |
677 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
678 | n->wdog_pid = c_n->wdog_pid; | |
679 | n->mounted_uid = c_n->mounted_uid; | |
680 | } else if (version == 4) { | |
681 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
682 | struct ncp_mount_data_v4 *n = raw_data; | |
683 | ||
684 | n->dir_mode = c_n->dir_mode; | |
685 | n->file_mode = c_n->file_mode; | |
686 | n->gid = c_n->gid; | |
687 | n->uid = c_n->uid; | |
688 | n->retry_count = c_n->retry_count; | |
689 | n->time_out = c_n->time_out; | |
690 | n->ncp_fd = c_n->ncp_fd; | |
691 | n->wdog_pid = c_n->wdog_pid; | |
692 | n->mounted_uid = c_n->mounted_uid; | |
693 | n->flags = c_n->flags; | |
694 | } else if (version != 5) { | |
695 | return NULL; | |
696 | } | |
697 | ||
698 | return raw_data; | |
699 | } | |
700 | ||
1da177e4 | 701 | |
9a9947bf DH |
702 | struct compat_nfs_string { |
703 | compat_uint_t len; | |
5fc3e624 | 704 | compat_uptr_t data; |
9a9947bf DH |
705 | }; |
706 | ||
707 | static inline void compat_nfs_string(struct nfs_string *dst, | |
708 | struct compat_nfs_string *src) | |
709 | { | |
710 | dst->data = compat_ptr(src->data); | |
711 | dst->len = src->len; | |
712 | } | |
713 | ||
714 | struct compat_nfs4_mount_data_v1 { | |
715 | compat_int_t version; | |
716 | compat_int_t flags; | |
717 | compat_int_t rsize; | |
718 | compat_int_t wsize; | |
719 | compat_int_t timeo; | |
720 | compat_int_t retrans; | |
721 | compat_int_t acregmin; | |
722 | compat_int_t acregmax; | |
723 | compat_int_t acdirmin; | |
724 | compat_int_t acdirmax; | |
725 | struct compat_nfs_string client_addr; | |
726 | struct compat_nfs_string mnt_path; | |
727 | struct compat_nfs_string hostname; | |
728 | compat_uint_t host_addrlen; | |
5fc3e624 | 729 | compat_uptr_t host_addr; |
9a9947bf DH |
730 | compat_int_t proto; |
731 | compat_int_t auth_flavourlen; | |
5fc3e624 | 732 | compat_uptr_t auth_flavours; |
9a9947bf DH |
733 | }; |
734 | ||
735 | static int do_nfs4_super_data_conv(void *raw_data) | |
736 | { | |
737 | int version = *(compat_uint_t *) raw_data; | |
738 | ||
739 | if (version == 1) { | |
740 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
741 | struct nfs4_mount_data *real = raw_data; | |
742 | ||
743 | /* copy the fields backwards */ | |
744 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
745 | real->auth_flavourlen = raw->auth_flavourlen; | |
746 | real->proto = raw->proto; | |
747 | real->host_addr = compat_ptr(raw->host_addr); | |
748 | real->host_addrlen = raw->host_addrlen; | |
749 | compat_nfs_string(&real->hostname, &raw->hostname); | |
750 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
751 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
752 | real->acdirmax = raw->acdirmax; | |
753 | real->acdirmin = raw->acdirmin; | |
754 | real->acregmax = raw->acregmax; | |
755 | real->acregmin = raw->acregmin; | |
756 | real->retrans = raw->retrans; | |
757 | real->timeo = raw->timeo; | |
758 | real->wsize = raw->wsize; | |
759 | real->rsize = raw->rsize; | |
760 | real->flags = raw->flags; | |
761 | real->version = raw->version; | |
762 | } | |
9a9947bf DH |
763 | |
764 | return 0; | |
765 | } | |
766 | ||
1da177e4 | 767 | #define NCPFS_NAME "ncpfs" |
9a9947bf | 768 | #define NFS4_NAME "nfs4" |
1da177e4 | 769 | |
c7887325 DH |
770 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
771 | const char __user * dir_name, | |
772 | const char __user * type, unsigned long flags, | |
773 | const void __user * data) | |
1da177e4 | 774 | { |
eca6f534 | 775 | char *kernel_type; |
1da177e4 | 776 | unsigned long data_page; |
eca6f534 | 777 | char *kernel_dev; |
91a27b2a | 778 | struct filename *dir; |
1da177e4 LT |
779 | int retval; |
780 | ||
eca6f534 | 781 | retval = copy_mount_string(type, &kernel_type); |
1da177e4 LT |
782 | if (retval < 0) |
783 | goto out; | |
784 | ||
91a27b2a JL |
785 | dir = getname(dir_name); |
786 | retval = PTR_ERR(dir); | |
787 | if (IS_ERR(dir)) | |
1da177e4 LT |
788 | goto out1; |
789 | ||
eca6f534 | 790 | retval = copy_mount_string(dev_name, &kernel_dev); |
1da177e4 LT |
791 | if (retval < 0) |
792 | goto out2; | |
793 | ||
eca6f534 | 794 | retval = copy_mount_options(data, &data_page); |
1da177e4 LT |
795 | if (retval < 0) |
796 | goto out3; | |
797 | ||
798 | retval = -EINVAL; | |
799 | ||
eca6f534 | 800 | if (kernel_type && data_page) { |
2116b7a4 | 801 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
1da177e4 | 802 | do_ncp_super_data_conv((void *)data_page); |
eca6f534 | 803 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
9a9947bf DH |
804 | if (do_nfs4_super_data_conv((void *) data_page)) |
805 | goto out4; | |
1da177e4 LT |
806 | } |
807 | } | |
808 | ||
91a27b2a | 809 | retval = do_mount(kernel_dev, dir->name, kernel_type, |
1da177e4 | 810 | flags, (void*)data_page); |
1da177e4 | 811 | |
9a9947bf | 812 | out4: |
1da177e4 LT |
813 | free_page(data_page); |
814 | out3: | |
eca6f534 | 815 | kfree(kernel_dev); |
1da177e4 | 816 | out2: |
91a27b2a | 817 | putname(dir); |
1da177e4 | 818 | out1: |
eca6f534 | 819 | kfree(kernel_type); |
1da177e4 LT |
820 | out: |
821 | return retval; | |
822 | } | |
823 | ||
1da177e4 LT |
824 | struct compat_old_linux_dirent { |
825 | compat_ulong_t d_ino; | |
826 | compat_ulong_t d_offset; | |
827 | unsigned short d_namlen; | |
828 | char d_name[1]; | |
829 | }; | |
830 | ||
831 | struct compat_readdir_callback { | |
832 | struct compat_old_linux_dirent __user *dirent; | |
833 | int result; | |
834 | }; | |
835 | ||
836 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 837 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
838 | { |
839 | struct compat_readdir_callback *buf = __buf; | |
840 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 841 | compat_ulong_t d_ino; |
1da177e4 LT |
842 | |
843 | if (buf->result) | |
844 | return -EINVAL; | |
afefdbb2 | 845 | d_ino = ino; |
8f3f655d AV |
846 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
847 | buf->result = -EOVERFLOW; | |
afefdbb2 | 848 | return -EOVERFLOW; |
8f3f655d | 849 | } |
1da177e4 LT |
850 | buf->result++; |
851 | dirent = buf->dirent; | |
852 | if (!access_ok(VERIFY_WRITE, dirent, | |
853 | (unsigned long)(dirent->d_name + namlen + 1) - | |
854 | (unsigned long)dirent)) | |
855 | goto efault; | |
afefdbb2 | 856 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
857 | __put_user(offset, &dirent->d_offset) || |
858 | __put_user(namlen, &dirent->d_namlen) || | |
859 | __copy_to_user(dirent->d_name, name, namlen) || | |
860 | __put_user(0, dirent->d_name + namlen)) | |
861 | goto efault; | |
862 | return 0; | |
863 | efault: | |
864 | buf->result = -EFAULT; | |
865 | return -EFAULT; | |
866 | } | |
867 | ||
868 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
869 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
870 | { | |
871 | int error; | |
2903ff01 | 872 | struct fd f = fdget(fd); |
1da177e4 LT |
873 | struct compat_readdir_callback buf; |
874 | ||
2903ff01 | 875 | if (!f.file) |
863ced7f | 876 | return -EBADF; |
1da177e4 LT |
877 | |
878 | buf.result = 0; | |
879 | buf.dirent = dirent; | |
880 | ||
2903ff01 | 881 | error = vfs_readdir(f.file, compat_fillonedir, &buf); |
53c9c5c0 | 882 | if (buf.result) |
1da177e4 LT |
883 | error = buf.result; |
884 | ||
2903ff01 | 885 | fdput(f); |
1da177e4 LT |
886 | return error; |
887 | } | |
888 | ||
889 | struct compat_linux_dirent { | |
890 | compat_ulong_t d_ino; | |
891 | compat_ulong_t d_off; | |
892 | unsigned short d_reclen; | |
893 | char d_name[1]; | |
894 | }; | |
895 | ||
896 | struct compat_getdents_callback { | |
897 | struct compat_linux_dirent __user *current_dir; | |
898 | struct compat_linux_dirent __user *previous; | |
899 | int count; | |
900 | int error; | |
901 | }; | |
902 | ||
903 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 904 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
905 | { |
906 | struct compat_linux_dirent __user * dirent; | |
907 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 908 | compat_ulong_t d_ino; |
85c9fe8f KW |
909 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
910 | 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 | { | |
2903ff01 | 949 | struct fd f; |
1da177e4 LT |
950 | struct compat_linux_dirent __user * lastdirent; |
951 | struct compat_getdents_callback buf; | |
952 | int error; | |
953 | ||
1da177e4 | 954 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
863ced7f | 955 | return -EFAULT; |
1da177e4 | 956 | |
2903ff01 AV |
957 | f = fdget(fd); |
958 | if (!f.file) | |
863ced7f | 959 | return -EBADF; |
1da177e4 LT |
960 | |
961 | buf.current_dir = dirent; | |
962 | buf.previous = NULL; | |
963 | buf.count = count; | |
964 | buf.error = 0; | |
965 | ||
2903ff01 | 966 | error = vfs_readdir(f.file, compat_filldir, &buf); |
53c9c5c0 AV |
967 | if (error >= 0) |
968 | error = buf.error; | |
1da177e4 LT |
969 | lastdirent = buf.previous; |
970 | if (lastdirent) { | |
2903ff01 | 971 | if (put_user(f.file->f_pos, &lastdirent->d_off)) |
1da177e4 LT |
972 | error = -EFAULT; |
973 | else | |
974 | error = count - buf.count; | |
975 | } | |
2903ff01 | 976 | fdput(f); |
1da177e4 LT |
977 | return error; |
978 | } | |
979 | ||
980 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
981 | |
982 | struct compat_getdents_callback64 { | |
983 | struct linux_dirent64 __user *current_dir; | |
984 | struct linux_dirent64 __user *previous; | |
985 | int count; | |
986 | int error; | |
987 | }; | |
988 | ||
989 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 990 | u64 ino, unsigned int d_type) |
1da177e4 LT |
991 | { |
992 | struct linux_dirent64 __user *dirent; | |
993 | struct compat_getdents_callback64 *buf = __buf; | |
85c9fe8f KW |
994 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
995 | sizeof(u64)); | |
1da177e4 LT |
996 | u64 off; |
997 | ||
998 | buf->error = -EINVAL; /* only used if we fail.. */ | |
999 | if (reclen > buf->count) | |
1000 | return -EINVAL; | |
1001 | dirent = buf->previous; | |
1002 | ||
1003 | if (dirent) { | |
1004 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1005 | goto efault; | |
1006 | } | |
1007 | dirent = buf->current_dir; | |
1008 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1009 | goto efault; | |
1010 | off = 0; | |
1011 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1012 | goto efault; | |
1013 | if (__put_user(reclen, &dirent->d_reclen)) | |
1014 | goto efault; | |
1015 | if (__put_user(d_type, &dirent->d_type)) | |
1016 | goto efault; | |
1017 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1018 | goto efault; | |
1019 | if (__put_user(0, dirent->d_name + namlen)) | |
1020 | goto efault; | |
1021 | buf->previous = dirent; | |
1022 | dirent = (void __user *)dirent + reclen; | |
1023 | buf->current_dir = dirent; | |
1024 | buf->count -= reclen; | |
1025 | return 0; | |
1026 | efault: | |
1027 | buf->error = -EFAULT; | |
1028 | return -EFAULT; | |
1029 | } | |
1030 | ||
1031 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1032 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1033 | { | |
2903ff01 | 1034 | struct fd f; |
1da177e4 LT |
1035 | struct linux_dirent64 __user * lastdirent; |
1036 | struct compat_getdents_callback64 buf; | |
1037 | int error; | |
1038 | ||
1da177e4 | 1039 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
863ced7f | 1040 | return -EFAULT; |
1da177e4 | 1041 | |
2903ff01 AV |
1042 | f = fdget(fd); |
1043 | if (!f.file) | |
863ced7f | 1044 | return -EBADF; |
1da177e4 LT |
1045 | |
1046 | buf.current_dir = dirent; | |
1047 | buf.previous = NULL; | |
1048 | buf.count = count; | |
1049 | buf.error = 0; | |
1050 | ||
2903ff01 | 1051 | error = vfs_readdir(f.file, compat_filldir64, &buf); |
53c9c5c0 AV |
1052 | if (error >= 0) |
1053 | error = buf.error; | |
1da177e4 LT |
1054 | lastdirent = buf.previous; |
1055 | if (lastdirent) { | |
2903ff01 | 1056 | typeof(lastdirent->d_off) d_off = f.file->f_pos; |
7116e994 | 1057 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
53c9c5c0 AV |
1058 | error = -EFAULT; |
1059 | else | |
1060 | error = count - buf.count; | |
1da177e4 | 1061 | } |
2903ff01 | 1062 | fdput(f); |
1da177e4 LT |
1063 | return error; |
1064 | } | |
1065 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1066 | ||
1067 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1068 | const struct compat_iovec __user *uvector, | |
1069 | unsigned long nr_segs, loff_t *pos) | |
1070 | { | |
1da177e4 LT |
1071 | compat_ssize_t tot_len; |
1072 | struct iovec iovstack[UIO_FASTIOV]; | |
767b68e9 | 1073 | struct iovec *iov = iovstack; |
1da177e4 | 1074 | ssize_t ret; |
1da177e4 LT |
1075 | io_fn_t fn; |
1076 | iov_fn_t fnv; | |
1077 | ||
1da177e4 | 1078 | ret = -EINVAL; |
1da177e4 LT |
1079 | if (!file->f_op) |
1080 | goto out; | |
b8373363 | 1081 | |
1da177e4 LT |
1082 | ret = -EFAULT; |
1083 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1084 | goto out; | |
1085 | ||
b8373363 | 1086 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
ac34ebb3 | 1087 | UIO_FASTIOV, iovstack, &iov); |
1da177e4 LT |
1088 | if (tot_len == 0) { |
1089 | ret = 0; | |
1090 | goto out; | |
1091 | } | |
1092 | ||
1093 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1094 | if (ret < 0) |
1da177e4 LT |
1095 | goto out; |
1096 | ||
1097 | fnv = NULL; | |
1098 | if (type == READ) { | |
1099 | fn = file->f_op->read; | |
ee0b3e67 | 1100 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1101 | } else { |
1102 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1103 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1104 | } |
1105 | ||
ee0b3e67 BP |
1106 | if (fnv) |
1107 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1108 | pos, fnv); | |
1109 | else | |
1110 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1111 | |
1da177e4 LT |
1112 | out: |
1113 | if (iov != iovstack) | |
1114 | kfree(iov); | |
0eeca283 | 1115 | if ((ret + (type == READ)) > 0) { |
0eeca283 | 1116 | if (type == READ) |
2a12a9d7 | 1117 | fsnotify_access(file); |
0eeca283 | 1118 | else |
2a12a9d7 | 1119 | fsnotify_modify(file); |
0eeca283 | 1120 | } |
1da177e4 LT |
1121 | return ret; |
1122 | } | |
1123 | ||
dac12138 GH |
1124 | static size_t compat_readv(struct file *file, |
1125 | const struct compat_iovec __user *vec, | |
1126 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1127 | { |
1da177e4 LT |
1128 | ssize_t ret = -EBADF; |
1129 | ||
1da177e4 LT |
1130 | if (!(file->f_mode & FMODE_READ)) |
1131 | goto out; | |
1132 | ||
1133 | ret = -EINVAL; | |
ee0b3e67 | 1134 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1135 | goto out; |
1136 | ||
dac12138 | 1137 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1da177e4 LT |
1138 | |
1139 | out: | |
ca8a5bd2 GH |
1140 | if (ret > 0) |
1141 | add_rchar(current, ret); | |
1142 | inc_syscr(current); | |
dac12138 GH |
1143 | return ret; |
1144 | } | |
1145 | ||
1146 | asmlinkage ssize_t | |
1147 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, | |
1148 | unsigned long vlen) | |
1149 | { | |
2903ff01 | 1150 | struct fd f = fdget(fd); |
dac12138 | 1151 | ssize_t ret; |
0e665d5d | 1152 | loff_t pos; |
dac12138 | 1153 | |
2903ff01 | 1154 | if (!f.file) |
dac12138 | 1155 | return -EBADF; |
2903ff01 AV |
1156 | pos = f.file->f_pos; |
1157 | ret = compat_readv(f.file, vec, vlen, &pos); | |
1158 | f.file->f_pos = pos; | |
1159 | fdput(f); | |
1da177e4 LT |
1160 | return ret; |
1161 | } | |
1162 | ||
f3554f4b | 1163 | asmlinkage ssize_t |
4ee5c0d0 L |
1164 | compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec, |
1165 | unsigned long vlen, loff_t pos) | |
f3554f4b | 1166 | { |
2903ff01 | 1167 | struct fd f; |
f3554f4b GH |
1168 | ssize_t ret; |
1169 | ||
1170 | if (pos < 0) | |
1171 | return -EINVAL; | |
2903ff01 AV |
1172 | f = fdget(fd); |
1173 | if (!f.file) | |
f3554f4b | 1174 | return -EBADF; |
586ce098 | 1175 | ret = -ESPIPE; |
2903ff01 AV |
1176 | if (f.file->f_mode & FMODE_PREAD) |
1177 | ret = compat_readv(f.file, vec, vlen, &pos); | |
1178 | fdput(f); | |
f3554f4b GH |
1179 | return ret; |
1180 | } | |
1181 | ||
4ee5c0d0 L |
1182 | asmlinkage ssize_t |
1183 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, | |
1184 | unsigned long vlen, u32 pos_low, u32 pos_high) | |
1185 | { | |
1186 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1187 | return compat_sys_preadv64(fd, vec, vlen, pos); | |
1188 | } | |
1189 | ||
6949a631 GH |
1190 | static size_t compat_writev(struct file *file, |
1191 | const struct compat_iovec __user *vec, | |
1192 | unsigned long vlen, loff_t *pos) | |
1da177e4 | 1193 | { |
1da177e4 LT |
1194 | ssize_t ret = -EBADF; |
1195 | ||
1da177e4 LT |
1196 | if (!(file->f_mode & FMODE_WRITE)) |
1197 | goto out; | |
1198 | ||
1199 | ret = -EINVAL; | |
ee0b3e67 | 1200 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1201 | goto out; |
1202 | ||
6949a631 | 1203 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1da177e4 LT |
1204 | |
1205 | out: | |
ca8a5bd2 GH |
1206 | if (ret > 0) |
1207 | add_wchar(current, ret); | |
1208 | inc_syscw(current); | |
6949a631 GH |
1209 | return ret; |
1210 | } | |
1211 | ||
1212 | asmlinkage ssize_t | |
1213 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, | |
1214 | unsigned long vlen) | |
1215 | { | |
2903ff01 | 1216 | struct fd f = fdget(fd); |
6949a631 | 1217 | ssize_t ret; |
0e665d5d | 1218 | loff_t pos; |
6949a631 | 1219 | |
2903ff01 | 1220 | if (!f.file) |
6949a631 | 1221 | return -EBADF; |
2903ff01 AV |
1222 | pos = f.file->f_pos; |
1223 | ret = compat_writev(f.file, vec, vlen, &pos); | |
1224 | f.file->f_pos = pos; | |
1225 | fdput(f); | |
1da177e4 LT |
1226 | return ret; |
1227 | } | |
1228 | ||
f3554f4b | 1229 | asmlinkage ssize_t |
4ee5c0d0 L |
1230 | compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec, |
1231 | unsigned long vlen, loff_t pos) | |
f3554f4b | 1232 | { |
2903ff01 | 1233 | struct fd f; |
f3554f4b GH |
1234 | ssize_t ret; |
1235 | ||
1236 | if (pos < 0) | |
1237 | return -EINVAL; | |
2903ff01 AV |
1238 | f = fdget(fd); |
1239 | if (!f.file) | |
f3554f4b | 1240 | return -EBADF; |
586ce098 | 1241 | ret = -ESPIPE; |
2903ff01 AV |
1242 | if (f.file->f_mode & FMODE_PWRITE) |
1243 | ret = compat_writev(f.file, vec, vlen, &pos); | |
1244 | fdput(f); | |
f3554f4b GH |
1245 | return ret; |
1246 | } | |
1247 | ||
4ee5c0d0 L |
1248 | asmlinkage ssize_t |
1249 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, | |
1250 | unsigned long vlen, u32 pos_low, u32 pos_high) | |
1251 | { | |
1252 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; | |
1253 | return compat_sys_pwritev64(fd, vec, vlen, pos); | |
1254 | } | |
1255 | ||
e922efc3 MS |
1256 | /* |
1257 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1258 | * O_LARGEFILE flag. | |
1259 | */ | |
f482e1b4 | 1260 | COMPAT_SYSCALL_DEFINE3(open, const char __user *, filename, int, flags, umode_t, mode) |
e922efc3 | 1261 | { |
5590ff0d UD |
1262 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1263 | } | |
1264 | ||
1265 | /* | |
1266 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1267 | * O_LARGEFILE flag. | |
1268 | */ | |
f482e1b4 | 1269 | COMPAT_SYSCALL_DEFINE4(openat, int, dfd, const char __user *, filename, int, flags, umode_t, mode) |
5590ff0d UD |
1270 | { |
1271 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1272 | } |
1273 | ||
1da177e4 LT |
1274 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
1275 | ||
b773ad40 TG |
1276 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1277 | int timeval, int ret) | |
1278 | { | |
1279 | struct timespec ts; | |
1280 | ||
1281 | if (!p) | |
1282 | return ret; | |
1283 | ||
1284 | if (current->personality & STICKY_TIMEOUTS) | |
1285 | goto sticky; | |
1286 | ||
1287 | /* No update for zero timeout */ | |
1288 | if (!end_time->tv_sec && !end_time->tv_nsec) | |
1289 | return ret; | |
1290 | ||
1291 | ktime_get_ts(&ts); | |
1292 | ts = timespec_sub(*end_time, ts); | |
1293 | if (ts.tv_sec < 0) | |
1294 | ts.tv_sec = ts.tv_nsec = 0; | |
1295 | ||
1296 | if (timeval) { | |
1297 | struct compat_timeval rtv; | |
1298 | ||
1299 | rtv.tv_sec = ts.tv_sec; | |
1300 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; | |
1301 | ||
1302 | if (!copy_to_user(p, &rtv, sizeof(rtv))) | |
1303 | return ret; | |
1304 | } else { | |
1305 | struct compat_timespec rts; | |
1306 | ||
1307 | rts.tv_sec = ts.tv_sec; | |
1308 | rts.tv_nsec = ts.tv_nsec; | |
1309 | ||
1310 | if (!copy_to_user(p, &rts, sizeof(rts))) | |
1311 | return ret; | |
1312 | } | |
1313 | /* | |
1314 | * If an application puts its timeval in read-only memory, we | |
1315 | * don't want the Linux-specific update to the timeval to | |
1316 | * cause a fault after the select has completed | |
1317 | * successfully. However, because we're not updating the | |
1318 | * timeval, we can't restart the system call. | |
1319 | */ | |
1320 | ||
1321 | sticky: | |
1322 | if (ret == -ERESTARTNOHAND) | |
1323 | ret = -EINTR; | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1da177e4 LT |
1327 | /* |
1328 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1329 | * 64-bit unsigned longs. | |
1330 | */ | |
858119e1 | 1331 | static |
1da177e4 LT |
1332 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1333 | unsigned long *fdset) | |
1334 | { | |
022a1692 | 1335 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1336 | if (ufdset) { |
1337 | unsigned long odd; | |
1338 | ||
1339 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1340 | return -EFAULT; | |
1341 | ||
1342 | odd = nr & 1UL; | |
1343 | nr &= ~1UL; | |
1344 | while (nr) { | |
1345 | unsigned long h, l; | |
7116e994 HC |
1346 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1347 | return -EFAULT; | |
1da177e4 LT |
1348 | ufdset += 2; |
1349 | *fdset++ = h << 32 | l; | |
1350 | nr -= 2; | |
1351 | } | |
7116e994 HC |
1352 | if (odd && __get_user(*fdset, ufdset)) |
1353 | return -EFAULT; | |
1da177e4 LT |
1354 | } else { |
1355 | /* Tricky, must clear full unsigned long in the | |
1356 | * kernel fdset at the end, this makes sure that | |
1357 | * actually happens. | |
1358 | */ | |
1359 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1360 | } | |
1361 | return 0; | |
1362 | } | |
1363 | ||
858119e1 | 1364 | static |
7116e994 HC |
1365 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1366 | unsigned long *fdset) | |
1da177e4 LT |
1367 | { |
1368 | unsigned long odd; | |
022a1692 | 1369 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1370 | |
1371 | if (!ufdset) | |
7116e994 | 1372 | return 0; |
1da177e4 LT |
1373 | |
1374 | odd = nr & 1UL; | |
1375 | nr &= ~1UL; | |
1376 | while (nr) { | |
1377 | unsigned long h, l; | |
1378 | l = *fdset++; | |
1379 | h = l >> 32; | |
7116e994 HC |
1380 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1381 | return -EFAULT; | |
1da177e4 LT |
1382 | ufdset += 2; |
1383 | nr -= 2; | |
1384 | } | |
7116e994 HC |
1385 | if (odd && __put_user(*fdset, ufdset)) |
1386 | return -EFAULT; | |
1387 | return 0; | |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | ||
1391 | /* | |
1392 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1393 | * should be compared to it from time to time | |
1394 | */ | |
1da177e4 LT |
1395 | |
1396 | /* | |
1397 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1398 | * like to be certain this leads to no problems. So I return | |
1399 | * EINTR just for safety. | |
1400 | * | |
1401 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1402 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1403 | */ | |
9f72949f | 1404 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
8ff3e8e8 AV |
1405 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1406 | struct timespec *end_time) | |
1da177e4 LT |
1407 | { |
1408 | fd_set_bits fds; | |
6087b2da | 1409 | void *bits; |
bbea9f69 | 1410 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1411 | struct fdtable *fdt; |
6087b2da | 1412 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1da177e4 | 1413 | |
1da177e4 LT |
1414 | if (n < 0) |
1415 | goto out_nofds; | |
1416 | ||
bbea9f69 | 1417 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1418 | rcu_read_lock(); |
a4531edd | 1419 | fdt = files_fdtable(current->files); |
bbea9f69 | 1420 | max_fds = fdt->max_fds; |
ac5b8b6f | 1421 | rcu_read_unlock(); |
bbea9f69 VL |
1422 | if (n > max_fds) |
1423 | n = max_fds; | |
1da177e4 LT |
1424 | |
1425 | /* | |
1426 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1427 | * since we used fdset we need to allocate memory in units of | |
1428 | * long-words. | |
1429 | */ | |
1da177e4 | 1430 | size = FDS_BYTES(n); |
6087b2da BP |
1431 | bits = stack_fds; |
1432 | if (size > sizeof(stack_fds) / 6) { | |
1433 | bits = kmalloc(6 * size, GFP_KERNEL); | |
1434 | ret = -ENOMEM; | |
1435 | if (!bits) | |
1436 | goto out_nofds; | |
1437 | } | |
1da177e4 LT |
1438 | fds.in = (unsigned long *) bits; |
1439 | fds.out = (unsigned long *) (bits + size); | |
1440 | fds.ex = (unsigned long *) (bits + 2*size); | |
1441 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1442 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1443 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1444 | ||
1445 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1446 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1447 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1448 | goto out; | |
1449 | zero_fd_set(n, fds.res_in); | |
1450 | zero_fd_set(n, fds.res_out); | |
1451 | zero_fd_set(n, fds.res_ex); | |
1452 | ||
8ff3e8e8 | 1453 | ret = do_select(n, &fds, end_time); |
1da177e4 LT |
1454 | |
1455 | if (ret < 0) | |
1456 | goto out; | |
1457 | if (!ret) { | |
1458 | ret = -ERESTARTNOHAND; | |
1459 | if (signal_pending(current)) | |
1460 | goto out; | |
1461 | ret = 0; | |
1462 | } | |
1463 | ||
7116e994 HC |
1464 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1465 | compat_set_fd_set(n, outp, fds.res_out) || | |
1466 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1467 | ret = -EFAULT; | |
1da177e4 | 1468 | out: |
6087b2da BP |
1469 | if (bits != stack_fds) |
1470 | kfree(bits); | |
1da177e4 LT |
1471 | out_nofds: |
1472 | return ret; | |
1473 | } | |
1474 | ||
9f72949f DW |
1475 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1476 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1477 | struct compat_timeval __user *tvp) | |
1478 | { | |
8ff3e8e8 | 1479 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1480 | struct compat_timeval tv; |
1481 | int ret; | |
1482 | ||
1483 | if (tvp) { | |
1484 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1485 | return -EFAULT; | |
1486 | ||
8ff3e8e8 | 1487 | to = &end_time; |
4d36a9e6 AV |
1488 | if (poll_select_set_timeout(to, |
1489 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), | |
1490 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) | |
9f72949f | 1491 | return -EINVAL; |
9f72949f DW |
1492 | } |
1493 | ||
8ff3e8e8 AV |
1494 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1495 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); | |
9f72949f DW |
1496 | |
1497 | return ret; | |
1498 | } | |
1499 | ||
5d0e5283 CH |
1500 | struct compat_sel_arg_struct { |
1501 | compat_ulong_t n; | |
1502 | compat_uptr_t inp; | |
1503 | compat_uptr_t outp; | |
1504 | compat_uptr_t exp; | |
1505 | compat_uptr_t tvp; | |
1506 | }; | |
1507 | ||
1508 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) | |
1509 | { | |
1510 | struct compat_sel_arg_struct a; | |
1511 | ||
1512 | if (copy_from_user(&a, arg, sizeof(a))) | |
1513 | return -EFAULT; | |
1514 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), | |
1515 | compat_ptr(a.exp), compat_ptr(a.tvp)); | |
1516 | } | |
1517 | ||
c9da9f21 | 1518 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
9f72949f DW |
1519 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1520 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1521 | compat_size_t sigsetsize) | |
1522 | { | |
1523 | compat_sigset_t ss32; | |
1524 | sigset_t ksigmask, sigsaved; | |
9f72949f | 1525 | struct compat_timespec ts; |
8ff3e8e8 | 1526 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1527 | int ret; |
1528 | ||
1529 | if (tsp) { | |
1530 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1531 | return -EFAULT; | |
1532 | ||
8ff3e8e8 AV |
1533 | to = &end_time; |
1534 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
9f72949f DW |
1535 | return -EINVAL; |
1536 | } | |
1537 | ||
1538 | if (sigmask) { | |
1539 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1540 | return -EINVAL; | |
1541 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1542 | return -EFAULT; | |
1543 | sigset_from_compat(&ksigmask, &ss32); | |
1544 | ||
1545 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1546 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1547 | } | |
1548 | ||
8ff3e8e8 AV |
1549 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1550 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); | |
9f72949f DW |
1551 | |
1552 | if (ret == -ERESTARTNOHAND) { | |
1553 | /* | |
1554 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1555 | * the signal on the way back to userspace, before the signal | |
1556 | * mask is restored. | |
1557 | */ | |
1558 | if (sigmask) { | |
1559 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1560 | sizeof(sigsaved)); | |
4e4c22c7 | 1561 | set_restore_sigmask(); |
9f72949f DW |
1562 | } |
1563 | } else if (sigmask) | |
1564 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1565 | ||
1566 | return ret; | |
1567 | } | |
1568 | ||
1569 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1570 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1571 | struct compat_timespec __user *tsp, void __user *sig) | |
1572 | { | |
1573 | compat_size_t sigsetsize = 0; | |
1574 | compat_uptr_t up = 0; | |
1575 | ||
1576 | if (sig) { | |
1577 | if (!access_ok(VERIFY_READ, sig, | |
1578 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1579 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1580 | __get_user(sigsetsize, | |
1581 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1582 | return -EFAULT; | |
1583 | } | |
c9da9f21 HC |
1584 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1585 | sigsetsize); | |
9f72949f DW |
1586 | } |
1587 | ||
1588 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1589 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1590 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1591 | { | |
1592 | compat_sigset_t ss32; | |
1593 | sigset_t ksigmask, sigsaved; | |
1594 | struct compat_timespec ts; | |
8ff3e8e8 | 1595 | struct timespec end_time, *to = NULL; |
9f72949f DW |
1596 | int ret; |
1597 | ||
1598 | if (tsp) { | |
1599 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1600 | return -EFAULT; | |
1601 | ||
8ff3e8e8 AV |
1602 | to = &end_time; |
1603 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) | |
1604 | return -EINVAL; | |
9f72949f DW |
1605 | } |
1606 | ||
1607 | if (sigmask) { | |
3835a9bd | 1608 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1609 | return -EINVAL; |
1610 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1611 | return -EFAULT; | |
1612 | sigset_from_compat(&ksigmask, &ss32); | |
1613 | ||
1614 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1615 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1616 | } | |
1617 | ||
8ff3e8e8 | 1618 | ret = do_sys_poll(ufds, nfds, to); |
9f72949f DW |
1619 | |
1620 | /* We can restart this syscall, usually */ | |
1621 | if (ret == -EINTR) { | |
1622 | /* | |
1623 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1624 | * the signal on the way back to userspace, before the signal | |
1625 | * mask is restored. | |
1626 | */ | |
1627 | if (sigmask) { | |
1628 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1629 | sizeof(sigsaved)); | |
4e4c22c7 | 1630 | set_restore_sigmask(); |
9f72949f DW |
1631 | } |
1632 | ret = -ERESTARTNOHAND; | |
1633 | } else if (sigmask) | |
1634 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1635 | ||
8ff3e8e8 | 1636 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
9f72949f DW |
1637 | |
1638 | return ret; | |
1639 | } | |
9f72949f | 1640 | |
becfd1f3 AK |
1641 | #ifdef CONFIG_FHANDLE |
1642 | /* | |
1643 | * Exactly like fs/open.c:sys_open_by_handle_at(), except that it | |
1644 | * doesn't set the O_LARGEFILE flag. | |
1645 | */ | |
f482e1b4 AV |
1646 | COMPAT_SYSCALL_DEFINE3(open_by_handle_at, int, mountdirfd, |
1647 | struct file_handle __user *, handle, int, flags) | |
becfd1f3 AK |
1648 | { |
1649 | return do_handle_open(mountdirfd, handle, flags); | |
1650 | } | |
1651 | #endif |