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Source at commit b386be689295730688885552666ea40b2e639b14 created 11 years 11 months ago. By Maarten ter Huurne, Revert "MIPS: JZ4740: reset: Initialize hibernate wakeup counters." | |
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1 | /* |
2 | * linux/fs/compat.c |
3 | * |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support |
5 | * on 64 bit kernels. |
6 | * |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs |
11 | * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License version 2 as |
15 | * published by the Free Software Foundation. |
16 | */ |
17 | |
18 | #include <linux/stddef.h> |
19 | #include <linux/kernel.h> |
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> |
28 | #include <linux/fdtable.h> |
29 | #include <linux/vfs.h> |
30 | #include <linux/ioctl.h> |
31 | #include <linux/init.h> |
32 | #include <linux/ncp_mount.h> |
33 | #include <linux/nfs4_mount.h> |
34 | #include <linux/syscalls.h> |
35 | #include <linux/ctype.h> |
36 | #include <linux/module.h> |
37 | #include <linux/dirent.h> |
38 | #include <linux/fsnotify.h> |
39 | #include <linux/highuid.h> |
40 | #include <linux/personality.h> |
41 | #include <linux/rwsem.h> |
42 | #include <linux/tsacct_kern.h> |
43 | #include <linux/security.h> |
44 | #include <linux/highmem.h> |
45 | #include <linux/signal.h> |
46 | #include <linux/poll.h> |
47 | #include <linux/mm.h> |
48 | #include <linux/eventpoll.h> |
49 | #include <linux/fs_struct.h> |
50 | #include <linux/slab.h> |
51 | #include <linux/pagemap.h> |
52 | |
53 | #include <asm/uaccess.h> |
54 | #include <asm/mmu_context.h> |
55 | #include <asm/ioctls.h> |
56 | #include "internal.h" |
57 | |
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 | |
72 | #include "read_write.h" |
73 | |
74 | /* |
75 | * Not all architectures have sys_utime, so implement this in terms |
76 | * of sys_utimes. |
77 | */ |
78 | asmlinkage long compat_sys_utime(const char __user *filename, |
79 | struct compat_utimbuf __user *t) |
80 | { |
81 | struct timespec tv[2]; |
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; |
87 | tv[0].tv_nsec = 0; |
88 | tv[1].tv_nsec = 0; |
89 | } |
90 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0); |
91 | } |
92 | |
93 | asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags) |
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 | |
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); |
106 | } |
107 | |
108 | asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t) |
109 | { |
110 | struct timespec tv[2]; |
111 | |
112 | if (t) { |
113 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
114 | get_user(tv[0].tv_nsec, &t[0].tv_usec) || |
115 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
116 | get_user(tv[1].tv_nsec, &t[1].tv_usec)) |
117 | return -EFAULT; |
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; |
123 | } |
124 | return do_utimes(dfd, filename, t ? tv : NULL, 0); |
125 | } |
126 | |
127 | asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t) |
128 | { |
129 | return compat_sys_futimesat(AT_FDCWD, filename, t); |
130 | } |
131 | |
132 | static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf) |
133 | { |
134 | struct compat_stat tmp; |
135 | |
136 | if (!old_valid_dev(stat->dev) || !old_valid_dev(stat->rdev)) |
137 | return -EOVERFLOW; |
138 | |
139 | memset(&tmp, 0, sizeof(tmp)); |
140 | tmp.st_dev = old_encode_dev(stat->dev); |
141 | tmp.st_ino = stat->ino; |
142 | if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino) |
143 | return -EOVERFLOW; |
144 | tmp.st_mode = stat->mode; |
145 | tmp.st_nlink = stat->nlink; |
146 | if (tmp.st_nlink != stat->nlink) |
147 | return -EOVERFLOW; |
148 | SET_UID(tmp.st_uid, stat->uid); |
149 | SET_GID(tmp.st_gid, stat->gid); |
150 | tmp.st_rdev = old_encode_dev(stat->rdev); |
151 | if ((u64) stat->size > MAX_NON_LFS) |
152 | return -EOVERFLOW; |
153 | tmp.st_size = stat->size; |
154 | tmp.st_atime = stat->atime.tv_sec; |
155 | tmp.st_atime_nsec = stat->atime.tv_nsec; |
156 | tmp.st_mtime = stat->mtime.tv_sec; |
157 | tmp.st_mtime_nsec = stat->mtime.tv_nsec; |
158 | tmp.st_ctime = stat->ctime.tv_sec; |
159 | tmp.st_ctime_nsec = stat->ctime.tv_nsec; |
160 | tmp.st_blocks = stat->blocks; |
161 | tmp.st_blksize = stat->blksize; |
162 | return copy_to_user(ubuf, &tmp, sizeof(tmp)) ? -EFAULT : 0; |
163 | } |
164 | |
165 | asmlinkage long compat_sys_newstat(const char __user * filename, |
166 | struct compat_stat __user *statbuf) |
167 | { |
168 | struct kstat stat; |
169 | int error; |
170 | |
171 | error = vfs_stat(filename, &stat); |
172 | if (error) |
173 | return error; |
174 | return cp_compat_stat(&stat, statbuf); |
175 | } |
176 | |
177 | asmlinkage long compat_sys_newlstat(const char __user * filename, |
178 | struct compat_stat __user *statbuf) |
179 | { |
180 | struct kstat stat; |
181 | int error; |
182 | |
183 | error = vfs_lstat(filename, &stat); |
184 | if (error) |
185 | return error; |
186 | return cp_compat_stat(&stat, statbuf); |
187 | } |
188 | |
189 | #ifndef __ARCH_WANT_STAT64 |
190 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, |
191 | const char __user *filename, |
192 | struct compat_stat __user *statbuf, int flag) |
193 | { |
194 | struct kstat stat; |
195 | int error; |
196 | |
197 | error = vfs_fstatat(dfd, filename, &stat, flag); |
198 | if (error) |
199 | return error; |
200 | return cp_compat_stat(&stat, statbuf); |
201 | } |
202 | #endif |
203 | |
204 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
205 | struct compat_stat __user * statbuf) |
206 | { |
207 | struct kstat stat; |
208 | int error = vfs_fstat(fd, &stat); |
209 | |
210 | if (!error) |
211 | error = cp_compat_stat(&stat, statbuf); |
212 | return error; |
213 | } |
214 | |
215 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) |
216 | { |
217 | |
218 | if (sizeof ubuf->f_blocks == 4) { |
219 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
220 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
221 | return -EOVERFLOW; |
222 | /* f_files and f_ffree may be -1; it's okay |
223 | * to stuff that into 32 bits */ |
224 | if (kbuf->f_files != 0xffffffffffffffffULL |
225 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
226 | return -EOVERFLOW; |
227 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
228 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
229 | return -EOVERFLOW; |
230 | } |
231 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
232 | __put_user(kbuf->f_type, &ubuf->f_type) || |
233 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
234 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
235 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
236 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
237 | __put_user(kbuf->f_files, &ubuf->f_files) || |
238 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
239 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
240 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
241 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
242 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
243 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
244 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
245 | return -EFAULT; |
246 | return 0; |
247 | } |
248 | |
249 | /* |
250 | * The following statfs calls are copies of code from fs/statfs.c and |
251 | * should be checked against those from time to time |
252 | */ |
253 | asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf) |
254 | { |
255 | struct kstatfs tmp; |
256 | int error = user_statfs(pathname, &tmp); |
257 | if (!error) |
258 | error = put_compat_statfs(buf, &tmp); |
259 | return error; |
260 | } |
261 | |
262 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) |
263 | { |
264 | struct kstatfs tmp; |
265 | int error = fd_statfs(fd, &tmp); |
266 | if (!error) |
267 | error = put_compat_statfs(buf, &tmp); |
268 | return error; |
269 | } |
270 | |
271 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) |
272 | { |
273 | if (sizeof ubuf->f_blocks == 4) { |
274 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail | |
275 | kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL) |
276 | return -EOVERFLOW; |
277 | /* f_files and f_ffree may be -1; it's okay |
278 | * to stuff that into 32 bits */ |
279 | if (kbuf->f_files != 0xffffffffffffffffULL |
280 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
281 | return -EOVERFLOW; |
282 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
283 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
284 | return -EOVERFLOW; |
285 | } |
286 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
287 | __put_user(kbuf->f_type, &ubuf->f_type) || |
288 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
289 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
290 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
291 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
292 | __put_user(kbuf->f_files, &ubuf->f_files) || |
293 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
294 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
295 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
296 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
297 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
298 | __put_user(kbuf->f_flags, &ubuf->f_flags) || |
299 | __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare))) |
300 | return -EFAULT; |
301 | return 0; |
302 | } |
303 | |
304 | asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf) |
305 | { |
306 | struct kstatfs tmp; |
307 | int error; |
308 | |
309 | if (sz != sizeof(*buf)) |
310 | return -EINVAL; |
311 | |
312 | error = user_statfs(pathname, &tmp); |
313 | if (!error) |
314 | error = put_compat_statfs64(buf, &tmp); |
315 | return error; |
316 | } |
317 | |
318 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) |
319 | { |
320 | struct kstatfs tmp; |
321 | int error; |
322 | |
323 | if (sz != sizeof(*buf)) |
324 | return -EINVAL; |
325 | |
326 | error = fd_statfs(fd, &tmp); |
327 | if (!error) |
328 | error = put_compat_statfs64(buf, &tmp); |
329 | return error; |
330 | } |
331 | |
332 | /* |
333 | * This is a copy of sys_ustat, just dealing with a structure layout. |
334 | * Given how simple this syscall is that apporach is more maintainable |
335 | * than the various conversion hacks. |
336 | */ |
337 | asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u) |
338 | { |
339 | struct compat_ustat tmp; |
340 | struct kstatfs sbuf; |
341 | int err = vfs_ustat(new_decode_dev(dev), &sbuf); |
342 | if (err) |
343 | return err; |
344 | |
345 | memset(&tmp, 0, sizeof(struct compat_ustat)); |
346 | tmp.f_tfree = sbuf.f_bfree; |
347 | tmp.f_tinode = sbuf.f_ffree; |
348 | if (copy_to_user(u, &tmp, sizeof(struct compat_ustat))) |
349 | return -EFAULT; |
350 | return 0; |
351 | } |
352 | |
353 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
354 | { |
355 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
356 | __get_user(kfl->l_type, &ufl->l_type) || |
357 | __get_user(kfl->l_whence, &ufl->l_whence) || |
358 | __get_user(kfl->l_start, &ufl->l_start) || |
359 | __get_user(kfl->l_len, &ufl->l_len) || |
360 | __get_user(kfl->l_pid, &ufl->l_pid)) |
361 | return -EFAULT; |
362 | return 0; |
363 | } |
364 | |
365 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
366 | { |
367 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
368 | __put_user(kfl->l_type, &ufl->l_type) || |
369 | __put_user(kfl->l_whence, &ufl->l_whence) || |
370 | __put_user(kfl->l_start, &ufl->l_start) || |
371 | __put_user(kfl->l_len, &ufl->l_len) || |
372 | __put_user(kfl->l_pid, &ufl->l_pid)) |
373 | return -EFAULT; |
374 | return 0; |
375 | } |
376 | |
377 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 |
378 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
379 | { |
380 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
381 | __get_user(kfl->l_type, &ufl->l_type) || |
382 | __get_user(kfl->l_whence, &ufl->l_whence) || |
383 | __get_user(kfl->l_start, &ufl->l_start) || |
384 | __get_user(kfl->l_len, &ufl->l_len) || |
385 | __get_user(kfl->l_pid, &ufl->l_pid)) |
386 | return -EFAULT; |
387 | return 0; |
388 | } |
389 | #endif |
390 | |
391 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 |
392 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
393 | { |
394 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
395 | __put_user(kfl->l_type, &ufl->l_type) || |
396 | __put_user(kfl->l_whence, &ufl->l_whence) || |
397 | __put_user(kfl->l_start, &ufl->l_start) || |
398 | __put_user(kfl->l_len, &ufl->l_len) || |
399 | __put_user(kfl->l_pid, &ufl->l_pid)) |
400 | return -EFAULT; |
401 | return 0; |
402 | } |
403 | #endif |
404 | |
405 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, |
406 | unsigned long arg) |
407 | { |
408 | mm_segment_t old_fs; |
409 | struct flock f; |
410 | long ret; |
411 | |
412 | switch (cmd) { |
413 | case F_GETLK: |
414 | case F_SETLK: |
415 | case F_SETLKW: |
416 | ret = get_compat_flock(&f, compat_ptr(arg)); |
417 | if (ret != 0) |
418 | break; |
419 | old_fs = get_fs(); |
420 | set_fs(KERNEL_DS); |
421 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); |
422 | set_fs(old_fs); |
423 | if (cmd == F_GETLK && ret == 0) { |
424 | /* GETLK was successful and we need to return the data... |
425 | * but it needs to fit in the compat structure. |
426 | * l_start shouldn't be too big, unless the original |
427 | * start + end is greater than COMPAT_OFF_T_MAX, in which |
428 | * case the app was asking for trouble, so we return |
429 | * -EOVERFLOW in that case. |
430 | * l_len could be too big, in which case we just truncate it, |
431 | * and only allow the app to see that part of the conflicting |
432 | * lock that might make sense to it anyway |
433 | */ |
434 | |
435 | if (f.l_start > COMPAT_OFF_T_MAX) |
436 | ret = -EOVERFLOW; |
437 | if (f.l_len > COMPAT_OFF_T_MAX) |
438 | f.l_len = COMPAT_OFF_T_MAX; |
439 | if (ret == 0) |
440 | ret = put_compat_flock(&f, compat_ptr(arg)); |
441 | } |
442 | break; |
443 | |
444 | case F_GETLK64: |
445 | case F_SETLK64: |
446 | case F_SETLKW64: |
447 | ret = get_compat_flock64(&f, compat_ptr(arg)); |
448 | if (ret != 0) |
449 | break; |
450 | old_fs = get_fs(); |
451 | set_fs(KERNEL_DS); |
452 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : |
453 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), |
454 | (unsigned long)&f); |
455 | set_fs(old_fs); |
456 | if (cmd == F_GETLK64 && ret == 0) { |
457 | /* need to return lock information - see above for commentary */ |
458 | if (f.l_start > COMPAT_LOFF_T_MAX) |
459 | ret = -EOVERFLOW; |
460 | if (f.l_len > COMPAT_LOFF_T_MAX) |
461 | f.l_len = COMPAT_LOFF_T_MAX; |
462 | if (ret == 0) |
463 | ret = put_compat_flock64(&f, compat_ptr(arg)); |
464 | } |
465 | break; |
466 | |
467 | default: |
468 | ret = sys_fcntl(fd, cmd, arg); |
469 | break; |
470 | } |
471 | return ret; |
472 | } |
473 | |
474 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, |
475 | unsigned long arg) |
476 | { |
477 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) |
478 | return -EINVAL; |
479 | return compat_sys_fcntl64(fd, cmd, arg); |
480 | } |
481 | |
482 | asmlinkage long |
483 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) |
484 | { |
485 | long ret; |
486 | aio_context_t ctx64; |
487 | |
488 | mm_segment_t oldfs = get_fs(); |
489 | if (unlikely(get_user(ctx64, ctx32p))) |
490 | return -EFAULT; |
491 | |
492 | set_fs(KERNEL_DS); |
493 | /* The __user pointer cast is valid because of the set_fs() */ |
494 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); |
495 | set_fs(oldfs); |
496 | /* truncating is ok because it's a user address */ |
497 | if (!ret) |
498 | ret = put_user((u32) ctx64, ctx32p); |
499 | return ret; |
500 | } |
501 | |
502 | asmlinkage long |
503 | compat_sys_io_getevents(aio_context_t ctx_id, |
504 | unsigned long min_nr, |
505 | unsigned long nr, |
506 | struct io_event __user *events, |
507 | struct compat_timespec __user *timeout) |
508 | { |
509 | long ret; |
510 | struct timespec t; |
511 | struct timespec __user *ut = NULL; |
512 | |
513 | ret = -EFAULT; |
514 | if (unlikely(!access_ok(VERIFY_WRITE, events, |
515 | nr * sizeof(struct io_event)))) |
516 | goto out; |
517 | if (timeout) { |
518 | if (get_compat_timespec(&t, timeout)) |
519 | goto out; |
520 | |
521 | ut = compat_alloc_user_space(sizeof(*ut)); |
522 | if (copy_to_user(ut, &t, sizeof(t)) ) |
523 | goto out; |
524 | } |
525 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
526 | out: |
527 | return ret; |
528 | } |
529 | |
530 | /* A write operation does a read from user space and vice versa */ |
531 | #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ) |
532 | |
533 | ssize_t compat_rw_copy_check_uvector(int type, |
534 | const struct compat_iovec __user *uvector, unsigned long nr_segs, |
535 | unsigned long fast_segs, struct iovec *fast_pointer, |
536 | struct iovec **ret_pointer, int check_access) |
537 | { |
538 | compat_ssize_t tot_len; |
539 | struct iovec *iov = *ret_pointer = fast_pointer; |
540 | ssize_t ret = 0; |
541 | int seg; |
542 | |
543 | /* |
544 | * SuS says "The readv() function *may* fail if the iovcnt argument |
545 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has |
546 | * traditionally returned zero for zero segments, so... |
547 | */ |
548 | if (nr_segs == 0) |
549 | goto out; |
550 | |
551 | ret = -EINVAL; |
552 | if (nr_segs > UIO_MAXIOV || nr_segs < 0) |
553 | goto out; |
554 | if (nr_segs > fast_segs) { |
555 | ret = -ENOMEM; |
556 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
557 | if (iov == NULL) |
558 | goto out; |
559 | } |
560 | *ret_pointer = iov; |
561 | |
562 | /* |
563 | * Single unix specification: |
564 | * We should -EINVAL if an element length is not >= 0 and fitting an |
565 | * ssize_t. |
566 | * |
567 | * In Linux, the total length is limited to MAX_RW_COUNT, there is |
568 | * no overflow possibility. |
569 | */ |
570 | tot_len = 0; |
571 | ret = -EINVAL; |
572 | for (seg = 0; seg < nr_segs; seg++) { |
573 | compat_uptr_t buf; |
574 | compat_ssize_t len; |
575 | |
576 | if (__get_user(len, &uvector->iov_len) || |
577 | __get_user(buf, &uvector->iov_base)) { |
578 | ret = -EFAULT; |
579 | goto out; |
580 | } |
581 | if (len < 0) /* size_t not fitting in compat_ssize_t .. */ |
582 | goto out; |
583 | if (check_access && |
584 | !access_ok(vrfy_dir(type), compat_ptr(buf), len)) { |
585 | ret = -EFAULT; |
586 | goto out; |
587 | } |
588 | if (len > MAX_RW_COUNT - tot_len) |
589 | len = MAX_RW_COUNT - tot_len; |
590 | tot_len += len; |
591 | iov->iov_base = compat_ptr(buf); |
592 | iov->iov_len = (compat_size_t) len; |
593 | uvector++; |
594 | iov++; |
595 | } |
596 | ret = tot_len; |
597 | |
598 | out: |
599 | return ret; |
600 | } |
601 | |
602 | static inline long |
603 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) |
604 | { |
605 | compat_uptr_t uptr; |
606 | int i; |
607 | |
608 | for (i = 0; i < nr; ++i) { |
609 | if (get_user(uptr, ptr32 + i)) |
610 | return -EFAULT; |
611 | if (put_user(compat_ptr(uptr), ptr64 + i)) |
612 | return -EFAULT; |
613 | } |
614 | return 0; |
615 | } |
616 | |
617 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
618 | |
619 | asmlinkage long |
620 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) |
621 | { |
622 | struct iocb __user * __user *iocb64; |
623 | long ret; |
624 | |
625 | if (unlikely(nr < 0)) |
626 | return -EINVAL; |
627 | |
628 | if (nr > MAX_AIO_SUBMITS) |
629 | nr = MAX_AIO_SUBMITS; |
630 | |
631 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); |
632 | ret = copy_iocb(nr, iocb, iocb64); |
633 | if (!ret) |
634 | ret = do_io_submit(ctx_id, nr, iocb64, 1); |
635 | return ret; |
636 | } |
637 | |
638 | struct compat_ncp_mount_data { |
639 | compat_int_t version; |
640 | compat_uint_t ncp_fd; |
641 | __compat_uid_t mounted_uid; |
642 | compat_pid_t wdog_pid; |
643 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; |
644 | compat_uint_t time_out; |
645 | compat_uint_t retry_count; |
646 | compat_uint_t flags; |
647 | __compat_uid_t uid; |
648 | __compat_gid_t gid; |
649 | compat_mode_t file_mode; |
650 | compat_mode_t dir_mode; |
651 | }; |
652 | |
653 | struct compat_ncp_mount_data_v4 { |
654 | compat_int_t version; |
655 | compat_ulong_t flags; |
656 | compat_ulong_t mounted_uid; |
657 | compat_long_t wdog_pid; |
658 | compat_uint_t ncp_fd; |
659 | compat_uint_t time_out; |
660 | compat_uint_t retry_count; |
661 | compat_ulong_t uid; |
662 | compat_ulong_t gid; |
663 | compat_ulong_t file_mode; |
664 | compat_ulong_t dir_mode; |
665 | }; |
666 | |
667 | static void *do_ncp_super_data_conv(void *raw_data) |
668 | { |
669 | int version = *(unsigned int *)raw_data; |
670 | |
671 | if (version == 3) { |
672 | struct compat_ncp_mount_data *c_n = raw_data; |
673 | struct ncp_mount_data *n = raw_data; |
674 | |
675 | n->dir_mode = c_n->dir_mode; |
676 | n->file_mode = c_n->file_mode; |
677 | n->gid = c_n->gid; |
678 | n->uid = c_n->uid; |
679 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); |
680 | n->wdog_pid = c_n->wdog_pid; |
681 | n->mounted_uid = c_n->mounted_uid; |
682 | } else if (version == 4) { |
683 | struct compat_ncp_mount_data_v4 *c_n = raw_data; |
684 | struct ncp_mount_data_v4 *n = raw_data; |
685 | |
686 | n->dir_mode = c_n->dir_mode; |
687 | n->file_mode = c_n->file_mode; |
688 | n->gid = c_n->gid; |
689 | n->uid = c_n->uid; |
690 | n->retry_count = c_n->retry_count; |
691 | n->time_out = c_n->time_out; |
692 | n->ncp_fd = c_n->ncp_fd; |
693 | n->wdog_pid = c_n->wdog_pid; |
694 | n->mounted_uid = c_n->mounted_uid; |
695 | n->flags = c_n->flags; |
696 | } else if (version != 5) { |
697 | return NULL; |
698 | } |
699 | |
700 | return raw_data; |
701 | } |
702 | |
703 | |
704 | struct compat_nfs_string { |
705 | compat_uint_t len; |
706 | compat_uptr_t data; |
707 | }; |
708 | |
709 | static inline void compat_nfs_string(struct nfs_string *dst, |
710 | struct compat_nfs_string *src) |
711 | { |
712 | dst->data = compat_ptr(src->data); |
713 | dst->len = src->len; |
714 | } |
715 | |
716 | struct compat_nfs4_mount_data_v1 { |
717 | compat_int_t version; |
718 | compat_int_t flags; |
719 | compat_int_t rsize; |
720 | compat_int_t wsize; |
721 | compat_int_t timeo; |
722 | compat_int_t retrans; |
723 | compat_int_t acregmin; |
724 | compat_int_t acregmax; |
725 | compat_int_t acdirmin; |
726 | compat_int_t acdirmax; |
727 | struct compat_nfs_string client_addr; |
728 | struct compat_nfs_string mnt_path; |
729 | struct compat_nfs_string hostname; |
730 | compat_uint_t host_addrlen; |
731 | compat_uptr_t host_addr; |
732 | compat_int_t proto; |
733 | compat_int_t auth_flavourlen; |
734 | compat_uptr_t auth_flavours; |
735 | }; |
736 | |
737 | static int do_nfs4_super_data_conv(void *raw_data) |
738 | { |
739 | int version = *(compat_uint_t *) raw_data; |
740 | |
741 | if (version == 1) { |
742 | struct compat_nfs4_mount_data_v1 *raw = raw_data; |
743 | struct nfs4_mount_data *real = raw_data; |
744 | |
745 | /* copy the fields backwards */ |
746 | real->auth_flavours = compat_ptr(raw->auth_flavours); |
747 | real->auth_flavourlen = raw->auth_flavourlen; |
748 | real->proto = raw->proto; |
749 | real->host_addr = compat_ptr(raw->host_addr); |
750 | real->host_addrlen = raw->host_addrlen; |
751 | compat_nfs_string(&real->hostname, &raw->hostname); |
752 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); |
753 | compat_nfs_string(&real->client_addr, &raw->client_addr); |
754 | real->acdirmax = raw->acdirmax; |
755 | real->acdirmin = raw->acdirmin; |
756 | real->acregmax = raw->acregmax; |
757 | real->acregmin = raw->acregmin; |
758 | real->retrans = raw->retrans; |
759 | real->timeo = raw->timeo; |
760 | real->wsize = raw->wsize; |
761 | real->rsize = raw->rsize; |
762 | real->flags = raw->flags; |
763 | real->version = raw->version; |
764 | } |
765 | |
766 | return 0; |
767 | } |
768 | |
769 | #define NCPFS_NAME "ncpfs" |
770 | #define NFS4_NAME "nfs4" |
771 | |
772 | asmlinkage long compat_sys_mount(const char __user * dev_name, |
773 | const char __user * dir_name, |
774 | const char __user * type, unsigned long flags, |
775 | const void __user * data) |
776 | { |
777 | char *kernel_type; |
778 | unsigned long data_page; |
779 | char *kernel_dev; |
780 | char *dir_page; |
781 | int retval; |
782 | |
783 | retval = copy_mount_string(type, &kernel_type); |
784 | if (retval < 0) |
785 | goto out; |
786 | |
787 | dir_page = getname(dir_name); |
788 | retval = PTR_ERR(dir_page); |
789 | if (IS_ERR(dir_page)) |
790 | goto out1; |
791 | |
792 | retval = copy_mount_string(dev_name, &kernel_dev); |
793 | if (retval < 0) |
794 | goto out2; |
795 | |
796 | retval = copy_mount_options(data, &data_page); |
797 | if (retval < 0) |
798 | goto out3; |
799 | |
800 | retval = -EINVAL; |
801 | |
802 | if (kernel_type && data_page) { |
803 | if (!strcmp(kernel_type, NCPFS_NAME)) { |
804 | do_ncp_super_data_conv((void *)data_page); |
805 | } else if (!strcmp(kernel_type, NFS4_NAME)) { |
806 | if (do_nfs4_super_data_conv((void *) data_page)) |
807 | goto out4; |
808 | } |
809 | } |
810 | |
811 | retval = do_mount(kernel_dev, dir_page, kernel_type, |
812 | flags, (void*)data_page); |
813 | |
814 | out4: |
815 | free_page(data_page); |
816 | out3: |
817 | kfree(kernel_dev); |
818 | out2: |
819 | putname(dir_page); |
820 | out1: |
821 | kfree(kernel_type); |
822 | out: |
823 | return retval; |
824 | } |
825 | |
826 | struct compat_old_linux_dirent { |
827 | compat_ulong_t d_ino; |
828 | compat_ulong_t d_offset; |
829 | unsigned short d_namlen; |
830 | char d_name[1]; |
831 | }; |
832 | |
833 | struct compat_readdir_callback { |
834 | struct compat_old_linux_dirent __user *dirent; |
835 | int result; |
836 | }; |
837 | |
838 | static int compat_fillonedir(void *__buf, const char *name, int namlen, |
839 | loff_t offset, u64 ino, unsigned int d_type) |
840 | { |
841 | struct compat_readdir_callback *buf = __buf; |
842 | struct compat_old_linux_dirent __user *dirent; |
843 | compat_ulong_t d_ino; |
844 | |
845 | if (buf->result) |
846 | return -EINVAL; |
847 | d_ino = ino; |
848 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
849 | buf->result = -EOVERFLOW; |
850 | return -EOVERFLOW; |
851 | } |
852 | buf->result++; |
853 | dirent = buf->dirent; |
854 | if (!access_ok(VERIFY_WRITE, dirent, |
855 | (unsigned long)(dirent->d_name + namlen + 1) - |
856 | (unsigned long)dirent)) |
857 | goto efault; |
858 | if ( __put_user(d_ino, &dirent->d_ino) || |
859 | __put_user(offset, &dirent->d_offset) || |
860 | __put_user(namlen, &dirent->d_namlen) || |
861 | __copy_to_user(dirent->d_name, name, namlen) || |
862 | __put_user(0, dirent->d_name + namlen)) |
863 | goto efault; |
864 | return 0; |
865 | efault: |
866 | buf->result = -EFAULT; |
867 | return -EFAULT; |
868 | } |
869 | |
870 | asmlinkage long compat_sys_old_readdir(unsigned int fd, |
871 | struct compat_old_linux_dirent __user *dirent, unsigned int count) |
872 | { |
873 | int error; |
874 | struct file *file; |
875 | struct compat_readdir_callback buf; |
876 | |
877 | error = -EBADF; |
878 | file = fget(fd); |
879 | if (!file) |
880 | goto out; |
881 | |
882 | buf.result = 0; |
883 | buf.dirent = dirent; |
884 | |
885 | error = vfs_readdir(file, compat_fillonedir, &buf); |
886 | if (buf.result) |
887 | error = buf.result; |
888 | |
889 | fput(file); |
890 | out: |
891 | return error; |
892 | } |
893 | |
894 | struct compat_linux_dirent { |
895 | compat_ulong_t d_ino; |
896 | compat_ulong_t d_off; |
897 | unsigned short d_reclen; |
898 | char d_name[1]; |
899 | }; |
900 | |
901 | struct compat_getdents_callback { |
902 | struct compat_linux_dirent __user *current_dir; |
903 | struct compat_linux_dirent __user *previous; |
904 | int count; |
905 | int error; |
906 | }; |
907 | |
908 | static int compat_filldir(void *__buf, const char *name, int namlen, |
909 | loff_t offset, u64 ino, unsigned int d_type) |
910 | { |
911 | struct compat_linux_dirent __user * dirent; |
912 | struct compat_getdents_callback *buf = __buf; |
913 | compat_ulong_t d_ino; |
914 | int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) + |
915 | namlen + 2, sizeof(compat_long_t)); |
916 | |
917 | buf->error = -EINVAL; /* only used if we fail.. */ |
918 | if (reclen > buf->count) |
919 | return -EINVAL; |
920 | d_ino = ino; |
921 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) { |
922 | buf->error = -EOVERFLOW; |
923 | return -EOVERFLOW; |
924 | } |
925 | dirent = buf->previous; |
926 | if (dirent) { |
927 | if (__put_user(offset, &dirent->d_off)) |
928 | goto efault; |
929 | } |
930 | dirent = buf->current_dir; |
931 | if (__put_user(d_ino, &dirent->d_ino)) |
932 | goto efault; |
933 | if (__put_user(reclen, &dirent->d_reclen)) |
934 | goto efault; |
935 | if (copy_to_user(dirent->d_name, name, namlen)) |
936 | goto efault; |
937 | if (__put_user(0, dirent->d_name + namlen)) |
938 | goto efault; |
939 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) |
940 | goto efault; |
941 | buf->previous = dirent; |
942 | dirent = (void __user *)dirent + reclen; |
943 | buf->current_dir = dirent; |
944 | buf->count -= reclen; |
945 | return 0; |
946 | efault: |
947 | buf->error = -EFAULT; |
948 | return -EFAULT; |
949 | } |
950 | |
951 | asmlinkage long compat_sys_getdents(unsigned int fd, |
952 | struct compat_linux_dirent __user *dirent, unsigned int count) |
953 | { |
954 | struct file * file; |
955 | struct compat_linux_dirent __user * lastdirent; |
956 | struct compat_getdents_callback buf; |
957 | int error; |
958 | |
959 | error = -EFAULT; |
960 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
961 | goto out; |
962 | |
963 | error = -EBADF; |
964 | file = fget(fd); |
965 | if (!file) |
966 | goto out; |
967 | |
968 | buf.current_dir = dirent; |
969 | buf.previous = NULL; |
970 | buf.count = count; |
971 | buf.error = 0; |
972 | |
973 | error = vfs_readdir(file, compat_filldir, &buf); |
974 | if (error >= 0) |
975 | error = buf.error; |
976 | lastdirent = buf.previous; |
977 | if (lastdirent) { |
978 | if (put_user(file->f_pos, &lastdirent->d_off)) |
979 | error = -EFAULT; |
980 | else |
981 | error = count - buf.count; |
982 | } |
983 | fput(file); |
984 | out: |
985 | return error; |
986 | } |
987 | |
988 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 |
989 | |
990 | struct compat_getdents_callback64 { |
991 | struct linux_dirent64 __user *current_dir; |
992 | struct linux_dirent64 __user *previous; |
993 | int count; |
994 | int error; |
995 | }; |
996 | |
997 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, |
998 | u64 ino, unsigned int d_type) |
999 | { |
1000 | struct linux_dirent64 __user *dirent; |
1001 | struct compat_getdents_callback64 *buf = __buf; |
1002 | int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1, |
1003 | sizeof(u64)); |
1004 | u64 off; |
1005 | |
1006 | buf->error = -EINVAL; /* only used if we fail.. */ |
1007 | if (reclen > buf->count) |
1008 | return -EINVAL; |
1009 | dirent = buf->previous; |
1010 | |
1011 | if (dirent) { |
1012 | if (__put_user_unaligned(offset, &dirent->d_off)) |
1013 | goto efault; |
1014 | } |
1015 | dirent = buf->current_dir; |
1016 | if (__put_user_unaligned(ino, &dirent->d_ino)) |
1017 | goto efault; |
1018 | off = 0; |
1019 | if (__put_user_unaligned(off, &dirent->d_off)) |
1020 | goto efault; |
1021 | if (__put_user(reclen, &dirent->d_reclen)) |
1022 | goto efault; |
1023 | if (__put_user(d_type, &dirent->d_type)) |
1024 | goto efault; |
1025 | if (copy_to_user(dirent->d_name, name, namlen)) |
1026 | goto efault; |
1027 | if (__put_user(0, dirent->d_name + namlen)) |
1028 | goto efault; |
1029 | buf->previous = dirent; |
1030 | dirent = (void __user *)dirent + reclen; |
1031 | buf->current_dir = dirent; |
1032 | buf->count -= reclen; |
1033 | return 0; |
1034 | efault: |
1035 | buf->error = -EFAULT; |
1036 | return -EFAULT; |
1037 | } |
1038 | |
1039 | asmlinkage long compat_sys_getdents64(unsigned int fd, |
1040 | struct linux_dirent64 __user * dirent, unsigned int count) |
1041 | { |
1042 | struct file * file; |
1043 | struct linux_dirent64 __user * lastdirent; |
1044 | struct compat_getdents_callback64 buf; |
1045 | int error; |
1046 | |
1047 | error = -EFAULT; |
1048 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
1049 | goto out; |
1050 | |
1051 | error = -EBADF; |
1052 | file = fget(fd); |
1053 | if (!file) |
1054 | goto out; |
1055 | |
1056 | buf.current_dir = dirent; |
1057 | buf.previous = NULL; |
1058 | buf.count = count; |
1059 | buf.error = 0; |
1060 | |
1061 | error = vfs_readdir(file, compat_filldir64, &buf); |
1062 | if (error >= 0) |
1063 | error = buf.error; |
1064 | lastdirent = buf.previous; |
1065 | if (lastdirent) { |
1066 | typeof(lastdirent->d_off) d_off = file->f_pos; |
1067 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) |
1068 | error = -EFAULT; |
1069 | else |
1070 | error = count - buf.count; |
1071 | } |
1072 | fput(file); |
1073 | out: |
1074 | return error; |
1075 | } |
1076 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ |
1077 | |
1078 | static ssize_t compat_do_readv_writev(int type, struct file *file, |
1079 | const struct compat_iovec __user *uvector, |
1080 | unsigned long nr_segs, loff_t *pos) |
1081 | { |
1082 | compat_ssize_t tot_len; |
1083 | struct iovec iovstack[UIO_FASTIOV]; |
1084 | struct iovec *iov = iovstack; |
1085 | ssize_t ret; |
1086 | io_fn_t fn; |
1087 | iov_fn_t fnv; |
1088 | |
1089 | ret = -EINVAL; |
1090 | if (!file->f_op) |
1091 | goto out; |
1092 | |
1093 | ret = -EFAULT; |
1094 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) |
1095 | goto out; |
1096 | |
1097 | tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs, |
1098 | UIO_FASTIOV, iovstack, &iov, 1); |
1099 | if (tot_len == 0) { |
1100 | ret = 0; |
1101 | goto out; |
1102 | } |
1103 | |
1104 | ret = rw_verify_area(type, file, pos, tot_len); |
1105 | if (ret < 0) |
1106 | goto out; |
1107 | |
1108 | fnv = NULL; |
1109 | if (type == READ) { |
1110 | fn = file->f_op->read; |
1111 | fnv = file->f_op->aio_read; |
1112 | } else { |
1113 | fn = (io_fn_t)file->f_op->write; |
1114 | fnv = file->f_op->aio_write; |
1115 | } |
1116 | |
1117 | if (fnv) |
1118 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, |
1119 | pos, fnv); |
1120 | else |
1121 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); |
1122 | |
1123 | out: |
1124 | if (iov != iovstack) |
1125 | kfree(iov); |
1126 | if ((ret + (type == READ)) > 0) { |
1127 | if (type == READ) |
1128 | fsnotify_access(file); |
1129 | else |
1130 | fsnotify_modify(file); |
1131 | } |
1132 | return ret; |
1133 | } |
1134 | |
1135 | static size_t compat_readv(struct file *file, |
1136 | const struct compat_iovec __user *vec, |
1137 | unsigned long vlen, loff_t *pos) |
1138 | { |
1139 | ssize_t ret = -EBADF; |
1140 | |
1141 | if (!(file->f_mode & FMODE_READ)) |
1142 | goto out; |
1143 | |
1144 | ret = -EINVAL; |
1145 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1146 | goto out; |
1147 | |
1148 | ret = compat_do_readv_writev(READ, file, vec, vlen, pos); |
1149 | |
1150 | out: |
1151 | if (ret > 0) |
1152 | add_rchar(current, ret); |
1153 | inc_syscr(current); |
1154 | return ret; |
1155 | } |
1156 | |
1157 | asmlinkage ssize_t |
1158 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, |
1159 | unsigned long vlen) |
1160 | { |
1161 | struct file *file; |
1162 | int fput_needed; |
1163 | ssize_t ret; |
1164 | |
1165 | file = fget_light(fd, &fput_needed); |
1166 | if (!file) |
1167 | return -EBADF; |
1168 | ret = compat_readv(file, vec, vlen, &file->f_pos); |
1169 | fput_light(file, fput_needed); |
1170 | return ret; |
1171 | } |
1172 | |
1173 | asmlinkage ssize_t |
1174 | compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, |
1175 | unsigned long vlen, u32 pos_low, u32 pos_high) |
1176 | { |
1177 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
1178 | struct file *file; |
1179 | int fput_needed; |
1180 | ssize_t ret; |
1181 | |
1182 | if (pos < 0) |
1183 | return -EINVAL; |
1184 | file = fget_light(fd, &fput_needed); |
1185 | if (!file) |
1186 | return -EBADF; |
1187 | ret = -ESPIPE; |
1188 | if (file->f_mode & FMODE_PREAD) |
1189 | ret = compat_readv(file, vec, vlen, &pos); |
1190 | fput_light(file, fput_needed); |
1191 | return ret; |
1192 | } |
1193 | |
1194 | static size_t compat_writev(struct file *file, |
1195 | const struct compat_iovec __user *vec, |
1196 | unsigned long vlen, loff_t *pos) |
1197 | { |
1198 | ssize_t ret = -EBADF; |
1199 | |
1200 | if (!(file->f_mode & FMODE_WRITE)) |
1201 | goto out; |
1202 | |
1203 | ret = -EINVAL; |
1204 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1205 | goto out; |
1206 | |
1207 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos); |
1208 | |
1209 | out: |
1210 | if (ret > 0) |
1211 | add_wchar(current, ret); |
1212 | inc_syscw(current); |
1213 | return ret; |
1214 | } |
1215 | |
1216 | asmlinkage ssize_t |
1217 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, |
1218 | unsigned long vlen) |
1219 | { |
1220 | struct file *file; |
1221 | int fput_needed; |
1222 | ssize_t ret; |
1223 | |
1224 | file = fget_light(fd, &fput_needed); |
1225 | if (!file) |
1226 | return -EBADF; |
1227 | ret = compat_writev(file, vec, vlen, &file->f_pos); |
1228 | fput_light(file, fput_needed); |
1229 | return ret; |
1230 | } |
1231 | |
1232 | asmlinkage ssize_t |
1233 | compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, |
1234 | unsigned long vlen, u32 pos_low, u32 pos_high) |
1235 | { |
1236 | loff_t pos = ((loff_t)pos_high << 32) | pos_low; |
1237 | struct file *file; |
1238 | int fput_needed; |
1239 | ssize_t ret; |
1240 | |
1241 | if (pos < 0) |
1242 | return -EINVAL; |
1243 | file = fget_light(fd, &fput_needed); |
1244 | if (!file) |
1245 | return -EBADF; |
1246 | ret = -ESPIPE; |
1247 | if (file->f_mode & FMODE_PWRITE) |
1248 | ret = compat_writev(file, vec, vlen, &pos); |
1249 | fput_light(file, fput_needed); |
1250 | return ret; |
1251 | } |
1252 | |
1253 | asmlinkage long |
1254 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, |
1255 | unsigned int nr_segs, unsigned int flags) |
1256 | { |
1257 | unsigned i; |
1258 | struct iovec __user *iov; |
1259 | if (nr_segs > UIO_MAXIOV) |
1260 | return -EINVAL; |
1261 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); |
1262 | for (i = 0; i < nr_segs; i++) { |
1263 | struct compat_iovec v; |
1264 | if (get_user(v.iov_base, &iov32[i].iov_base) || |
1265 | get_user(v.iov_len, &iov32[i].iov_len) || |
1266 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || |
1267 | put_user(v.iov_len, &iov[i].iov_len)) |
1268 | return -EFAULT; |
1269 | } |
1270 | return sys_vmsplice(fd, iov, nr_segs, flags); |
1271 | } |
1272 | |
1273 | /* |
1274 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the |
1275 | * O_LARGEFILE flag. |
1276 | */ |
1277 | asmlinkage long |
1278 | compat_sys_open(const char __user *filename, int flags, umode_t mode) |
1279 | { |
1280 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1281 | } |
1282 | |
1283 | /* |
1284 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the |
1285 | * O_LARGEFILE flag. |
1286 | */ |
1287 | asmlinkage long |
1288 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, umode_t mode) |
1289 | { |
1290 | return do_sys_open(dfd, filename, flags, mode); |
1291 | } |
1292 | |
1293 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
1294 | |
1295 | static int poll_select_copy_remaining(struct timespec *end_time, void __user *p, |
1296 | int timeval, int ret) |
1297 | { |
1298 | struct timespec ts; |
1299 | |
1300 | if (!p) |
1301 | return ret; |
1302 | |
1303 | if (current->personality & STICKY_TIMEOUTS) |
1304 | goto sticky; |
1305 | |
1306 | /* No update for zero timeout */ |
1307 | if (!end_time->tv_sec && !end_time->tv_nsec) |
1308 | return ret; |
1309 | |
1310 | ktime_get_ts(&ts); |
1311 | ts = timespec_sub(*end_time, ts); |
1312 | if (ts.tv_sec < 0) |
1313 | ts.tv_sec = ts.tv_nsec = 0; |
1314 | |
1315 | if (timeval) { |
1316 | struct compat_timeval rtv; |
1317 | |
1318 | rtv.tv_sec = ts.tv_sec; |
1319 | rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC; |
1320 | |
1321 | if (!copy_to_user(p, &rtv, sizeof(rtv))) |
1322 | return ret; |
1323 | } else { |
1324 | struct compat_timespec rts; |
1325 | |
1326 | rts.tv_sec = ts.tv_sec; |
1327 | rts.tv_nsec = ts.tv_nsec; |
1328 | |
1329 | if (!copy_to_user(p, &rts, sizeof(rts))) |
1330 | return ret; |
1331 | } |
1332 | /* |
1333 | * If an application puts its timeval in read-only memory, we |
1334 | * don't want the Linux-specific update to the timeval to |
1335 | * cause a fault after the select has completed |
1336 | * successfully. However, because we're not updating the |
1337 | * timeval, we can't restart the system call. |
1338 | */ |
1339 | |
1340 | sticky: |
1341 | if (ret == -ERESTARTNOHAND) |
1342 | ret = -EINTR; |
1343 | return ret; |
1344 | } |
1345 | |
1346 | /* |
1347 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
1348 | * 64-bit unsigned longs. |
1349 | */ |
1350 | static |
1351 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1352 | unsigned long *fdset) |
1353 | { |
1354 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1355 | if (ufdset) { |
1356 | unsigned long odd; |
1357 | |
1358 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) |
1359 | return -EFAULT; |
1360 | |
1361 | odd = nr & 1UL; |
1362 | nr &= ~1UL; |
1363 | while (nr) { |
1364 | unsigned long h, l; |
1365 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1366 | return -EFAULT; |
1367 | ufdset += 2; |
1368 | *fdset++ = h << 32 | l; |
1369 | nr -= 2; |
1370 | } |
1371 | if (odd && __get_user(*fdset, ufdset)) |
1372 | return -EFAULT; |
1373 | } else { |
1374 | /* Tricky, must clear full unsigned long in the |
1375 | * kernel fdset at the end, this makes sure that |
1376 | * actually happens. |
1377 | */ |
1378 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); |
1379 | } |
1380 | return 0; |
1381 | } |
1382 | |
1383 | static |
1384 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1385 | unsigned long *fdset) |
1386 | { |
1387 | unsigned long odd; |
1388 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1389 | |
1390 | if (!ufdset) |
1391 | return 0; |
1392 | |
1393 | odd = nr & 1UL; |
1394 | nr &= ~1UL; |
1395 | while (nr) { |
1396 | unsigned long h, l; |
1397 | l = *fdset++; |
1398 | h = l >> 32; |
1399 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1400 | return -EFAULT; |
1401 | ufdset += 2; |
1402 | nr -= 2; |
1403 | } |
1404 | if (odd && __put_user(*fdset, ufdset)) |
1405 | return -EFAULT; |
1406 | return 0; |
1407 | } |
1408 | |
1409 | |
1410 | /* |
1411 | * This is a virtual copy of sys_select from fs/select.c and probably |
1412 | * should be compared to it from time to time |
1413 | */ |
1414 | |
1415 | /* |
1416 | * We can actually return ERESTARTSYS instead of EINTR, but I'd |
1417 | * like to be certain this leads to no problems. So I return |
1418 | * EINTR just for safety. |
1419 | * |
1420 | * Update: ERESTARTSYS breaks at least the xview clock binary, so |
1421 | * I'm trying ERESTARTNOHAND which restart only when you want to. |
1422 | */ |
1423 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1424 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1425 | struct timespec *end_time) |
1426 | { |
1427 | fd_set_bits fds; |
1428 | void *bits; |
1429 | int size, max_fds, ret = -EINVAL; |
1430 | struct fdtable *fdt; |
1431 | long stack_fds[SELECT_STACK_ALLOC/sizeof(long)]; |
1432 | |
1433 | if (n < 0) |
1434 | goto out_nofds; |
1435 | |
1436 | /* max_fds can increase, so grab it once to avoid race */ |
1437 | rcu_read_lock(); |
1438 | fdt = files_fdtable(current->files); |
1439 | max_fds = fdt->max_fds; |
1440 | rcu_read_unlock(); |
1441 | if (n > max_fds) |
1442 | n = max_fds; |
1443 | |
1444 | /* |
1445 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), |
1446 | * since we used fdset we need to allocate memory in units of |
1447 | * long-words. |
1448 | */ |
1449 | size = FDS_BYTES(n); |
1450 | bits = stack_fds; |
1451 | if (size > sizeof(stack_fds) / 6) { |
1452 | bits = kmalloc(6 * size, GFP_KERNEL); |
1453 | ret = -ENOMEM; |
1454 | if (!bits) |
1455 | goto out_nofds; |
1456 | } |
1457 | fds.in = (unsigned long *) bits; |
1458 | fds.out = (unsigned long *) (bits + size); |
1459 | fds.ex = (unsigned long *) (bits + 2*size); |
1460 | fds.res_in = (unsigned long *) (bits + 3*size); |
1461 | fds.res_out = (unsigned long *) (bits + 4*size); |
1462 | fds.res_ex = (unsigned long *) (bits + 5*size); |
1463 | |
1464 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || |
1465 | (ret = compat_get_fd_set(n, outp, fds.out)) || |
1466 | (ret = compat_get_fd_set(n, exp, fds.ex))) |
1467 | goto out; |
1468 | zero_fd_set(n, fds.res_in); |
1469 | zero_fd_set(n, fds.res_out); |
1470 | zero_fd_set(n, fds.res_ex); |
1471 | |
1472 | ret = do_select(n, &fds, end_time); |
1473 | |
1474 | if (ret < 0) |
1475 | goto out; |
1476 | if (!ret) { |
1477 | ret = -ERESTARTNOHAND; |
1478 | if (signal_pending(current)) |
1479 | goto out; |
1480 | ret = 0; |
1481 | } |
1482 | |
1483 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1484 | compat_set_fd_set(n, outp, fds.res_out) || |
1485 | compat_set_fd_set(n, exp, fds.res_ex)) |
1486 | ret = -EFAULT; |
1487 | out: |
1488 | if (bits != stack_fds) |
1489 | kfree(bits); |
1490 | out_nofds: |
1491 | return ret; |
1492 | } |
1493 | |
1494 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1495 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1496 | struct compat_timeval __user *tvp) |
1497 | { |
1498 | struct timespec end_time, *to = NULL; |
1499 | struct compat_timeval tv; |
1500 | int ret; |
1501 | |
1502 | if (tvp) { |
1503 | if (copy_from_user(&tv, tvp, sizeof(tv))) |
1504 | return -EFAULT; |
1505 | |
1506 | to = &end_time; |
1507 | if (poll_select_set_timeout(to, |
1508 | tv.tv_sec + (tv.tv_usec / USEC_PER_SEC), |
1509 | (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC)) |
1510 | return -EINVAL; |
1511 | } |
1512 | |
1513 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1514 | ret = poll_select_copy_remaining(&end_time, tvp, 1, ret); |
1515 | |
1516 | return ret; |
1517 | } |
1518 | |
1519 | struct compat_sel_arg_struct { |
1520 | compat_ulong_t n; |
1521 | compat_uptr_t inp; |
1522 | compat_uptr_t outp; |
1523 | compat_uptr_t exp; |
1524 | compat_uptr_t tvp; |
1525 | }; |
1526 | |
1527 | asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg) |
1528 | { |
1529 | struct compat_sel_arg_struct a; |
1530 | |
1531 | if (copy_from_user(&a, arg, sizeof(a))) |
1532 | return -EFAULT; |
1533 | return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp), |
1534 | compat_ptr(a.exp), compat_ptr(a.tvp)); |
1535 | } |
1536 | |
1537 | #ifdef HAVE_SET_RESTORE_SIGMASK |
1538 | static long do_compat_pselect(int n, compat_ulong_t __user *inp, |
1539 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1540 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, |
1541 | compat_size_t sigsetsize) |
1542 | { |
1543 | compat_sigset_t ss32; |
1544 | sigset_t ksigmask, sigsaved; |
1545 | struct compat_timespec ts; |
1546 | struct timespec end_time, *to = NULL; |
1547 | int ret; |
1548 | |
1549 | if (tsp) { |
1550 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
1551 | return -EFAULT; |
1552 | |
1553 | to = &end_time; |
1554 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
1555 | return -EINVAL; |
1556 | } |
1557 | |
1558 | if (sigmask) { |
1559 | if (sigsetsize != sizeof(compat_sigset_t)) |
1560 | return -EINVAL; |
1561 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
1562 | return -EFAULT; |
1563 | sigset_from_compat(&ksigmask, &ss32); |
1564 | |
1565 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
1566 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
1567 | } |
1568 | |
1569 | ret = compat_core_sys_select(n, inp, outp, exp, to); |
1570 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
1571 | |
1572 | if (ret == -ERESTARTNOHAND) { |
1573 | /* |
1574 | * Don't restore the signal mask yet. Let do_signal() deliver |
1575 | * the signal on the way back to userspace, before the signal |
1576 | * mask is restored. |
1577 | */ |
1578 | if (sigmask) { |
1579 | memcpy(¤t->saved_sigmask, &sigsaved, |
1580 | sizeof(sigsaved)); |
1581 | set_restore_sigmask(); |
1582 | } |
1583 | } else if (sigmask) |
1584 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
1585 | |
1586 | return ret; |
1587 | } |
1588 | |
1589 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, |
1590 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, |
1591 | struct compat_timespec __user *tsp, void __user *sig) |
1592 | { |
1593 | compat_size_t sigsetsize = 0; |
1594 | compat_uptr_t up = 0; |
1595 | |
1596 | if (sig) { |
1597 | if (!access_ok(VERIFY_READ, sig, |
1598 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || |
1599 | __get_user(up, (compat_uptr_t __user *)sig) || |
1600 | __get_user(sigsetsize, |
1601 | (compat_size_t __user *)(sig+sizeof(up)))) |
1602 | return -EFAULT; |
1603 | } |
1604 | return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up), |
1605 | sigsetsize); |
1606 | } |
1607 | |
1608 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, |
1609 | unsigned int nfds, struct compat_timespec __user *tsp, |
1610 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) |
1611 | { |
1612 | compat_sigset_t ss32; |
1613 | sigset_t ksigmask, sigsaved; |
1614 | struct compat_timespec ts; |
1615 | struct timespec end_time, *to = NULL; |
1616 | int ret; |
1617 | |
1618 | if (tsp) { |
1619 | if (copy_from_user(&ts, tsp, sizeof(ts))) |
1620 | return -EFAULT; |
1621 | |
1622 | to = &end_time; |
1623 | if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec)) |
1624 | return -EINVAL; |
1625 | } |
1626 | |
1627 | if (sigmask) { |
1628 | if (sigsetsize != sizeof(compat_sigset_t)) |
1629 | return -EINVAL; |
1630 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
1631 | return -EFAULT; |
1632 | sigset_from_compat(&ksigmask, &ss32); |
1633 | |
1634 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
1635 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
1636 | } |
1637 | |
1638 | ret = do_sys_poll(ufds, nfds, to); |
1639 | |
1640 | /* We can restart this syscall, usually */ |
1641 | if (ret == -EINTR) { |
1642 | /* |
1643 | * Don't restore the signal mask yet. Let do_signal() deliver |
1644 | * the signal on the way back to userspace, before the signal |
1645 | * mask is restored. |
1646 | */ |
1647 | if (sigmask) { |
1648 | memcpy(¤t->saved_sigmask, &sigsaved, |
1649 | sizeof(sigsaved)); |
1650 | set_restore_sigmask(); |
1651 | } |
1652 | ret = -ERESTARTNOHAND; |
1653 | } else if (sigmask) |
1654 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
1655 | |
1656 | ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); |
1657 | |
1658 | return ret; |
1659 | } |
1660 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
1661 | |
1662 | #ifdef CONFIG_EPOLL |
1663 | |
1664 | #ifdef HAVE_SET_RESTORE_SIGMASK |
1665 | asmlinkage long compat_sys_epoll_pwait(int epfd, |
1666 | struct compat_epoll_event __user *events, |
1667 | int maxevents, int timeout, |
1668 | const compat_sigset_t __user *sigmask, |
1669 | compat_size_t sigsetsize) |
1670 | { |
1671 | long err; |
1672 | compat_sigset_t csigmask; |
1673 | sigset_t ksigmask, sigsaved; |
1674 | |
1675 | /* |
1676 | * If the caller wants a certain signal mask to be set during the wait, |
1677 | * we apply it here. |
1678 | */ |
1679 | if (sigmask) { |
1680 | if (sigsetsize != sizeof(compat_sigset_t)) |
1681 | return -EINVAL; |
1682 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) |
1683 | return -EFAULT; |
1684 | sigset_from_compat(&ksigmask, &csigmask); |
1685 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); |
1686 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
1687 | } |
1688 | |
1689 | err = sys_epoll_wait(epfd, events, maxevents, timeout); |
1690 | |
1691 | /* |
1692 | * If we changed the signal mask, we need to restore the original one. |
1693 | * In case we've got a signal while waiting, we do not restore the |
1694 | * signal mask yet, and we allow do_signal() to deliver the signal on |
1695 | * the way back to userspace, before the signal mask is restored. |
1696 | */ |
1697 | if (sigmask) { |
1698 | if (err == -EINTR) { |
1699 | memcpy(¤t->saved_sigmask, &sigsaved, |
1700 | sizeof(sigsaved)); |
1701 | set_restore_sigmask(); |
1702 | } else |
1703 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
1704 | } |
1705 | |
1706 | return err; |
1707 | } |
1708 | #endif /* HAVE_SET_RESTORE_SIGMASK */ |
1709 | |
1710 | #endif /* CONFIG_EPOLL */ |
1711 | |
1712 | #ifdef CONFIG_SIGNALFD |
1713 | |
1714 | asmlinkage long compat_sys_signalfd4(int ufd, |
1715 | const compat_sigset_t __user *sigmask, |
1716 | compat_size_t sigsetsize, int flags) |
1717 | { |
1718 | compat_sigset_t ss32; |
1719 | sigset_t tmp; |
1720 | sigset_t __user *ksigmask; |
1721 | |
1722 | if (sigsetsize != sizeof(compat_sigset_t)) |
1723 | return -EINVAL; |
1724 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) |
1725 | return -EFAULT; |
1726 | sigset_from_compat(&tmp, &ss32); |
1727 | ksigmask = compat_alloc_user_space(sizeof(sigset_t)); |
1728 | if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t))) |
1729 | return -EFAULT; |
1730 | |
1731 | return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags); |
1732 | } |
1733 | |
1734 | asmlinkage long compat_sys_signalfd(int ufd, |
1735 | const compat_sigset_t __user *sigmask, |
1736 | compat_size_t sigsetsize) |
1737 | { |
1738 | return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0); |
1739 | } |
1740 | #endif /* CONFIG_SIGNALFD */ |
1741 | |
1742 | #ifdef CONFIG_TIMERFD |
1743 | |
1744 | asmlinkage long compat_sys_timerfd_settime(int ufd, int flags, |
1745 | const struct compat_itimerspec __user *utmr, |
1746 | struct compat_itimerspec __user *otmr) |
1747 | { |
1748 | int error; |
1749 | struct itimerspec t; |
1750 | struct itimerspec __user *ut; |
1751 | |
1752 | if (get_compat_itimerspec(&t, utmr)) |
1753 | return -EFAULT; |
1754 | ut = compat_alloc_user_space(2 * sizeof(struct itimerspec)); |
1755 | if (copy_to_user(&ut[0], &t, sizeof(t))) |
1756 | return -EFAULT; |
1757 | error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]); |
1758 | if (!error && otmr) |
1759 | error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) || |
1760 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
1761 | |
1762 | return error; |
1763 | } |
1764 | |
1765 | asmlinkage long compat_sys_timerfd_gettime(int ufd, |
1766 | struct compat_itimerspec __user *otmr) |
1767 | { |
1768 | int error; |
1769 | struct itimerspec t; |
1770 | struct itimerspec __user *ut; |
1771 | |
1772 | ut = compat_alloc_user_space(sizeof(struct itimerspec)); |
1773 | error = sys_timerfd_gettime(ufd, ut); |
1774 | if (!error) |
1775 | error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) || |
1776 | put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0; |
1777 | |
1778 | return error; |
1779 | } |
1780 | |
1781 | #endif /* CONFIG_TIMERFD */ |
1782 | |
1783 | #ifdef CONFIG_FHANDLE |
1784 | /* |
1785 | * Exactly like fs/open.c:sys_open_by_handle_at(), except that it |
1786 | * doesn't set the O_LARGEFILE flag. |
1787 | */ |
1788 | asmlinkage long |
1789 | compat_sys_open_by_handle_at(int mountdirfd, |
1790 | struct file_handle __user *handle, int flags) |
1791 | { |
1792 | return do_handle_open(mountdirfd, handle, flags); |
1793 | } |
1794 | #endif |
1795 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9