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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 | |
11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
18 | #include <linux/linkage.h> | |
19 | #include <linux/compat.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/time.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/fcntl.h> | |
24 | #include <linux/namei.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/vfs.h> | |
27 | #include <linux/ioctl32.h> | |
28 | #include <linux/ioctl.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/sockios.h> /* for SIOCDEVPRIVATE */ | |
31 | #include <linux/smb.h> | |
32 | #include <linux/smb_mount.h> | |
33 | #include <linux/ncp_mount.h> | |
9a9947bf | 34 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
35 | #include <linux/smp_lock.h> |
36 | #include <linux/syscalls.h> | |
37 | #include <linux/ctype.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/dirent.h> | |
0eeca283 | 40 | #include <linux/fsnotify.h> |
1da177e4 LT |
41 | #include <linux/highuid.h> |
42 | #include <linux/sunrpc/svc.h> | |
43 | #include <linux/nfsd/nfsd.h> | |
44 | #include <linux/nfsd/syscall.h> | |
45 | #include <linux/personality.h> | |
46 | #include <linux/rwsem.h> | |
8f0ab514 | 47 | #include <linux/tsacct_kern.h> |
a1f8e7f7 | 48 | #include <linux/highmem.h> |
bd01f843 | 49 | #include <linux/poll.h> |
4a805e86 | 50 | #include <linux/mm.h> |
f6dfb4fd | 51 | #include <linux/eventpoll.h> |
1da177e4 LT |
52 | |
53 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
54 | ||
55 | #include <asm/uaccess.h> | |
56 | #include <asm/mmu_context.h> | |
57 | #include <asm/ioctls.h> | |
07f3f05c | 58 | #include "internal.h" |
9f72949f | 59 | |
bebfa101 AK |
60 | int compat_log = 1; |
61 | ||
62 | int compat_printk(const char *fmt, ...) | |
63 | { | |
64 | va_list ap; | |
65 | int ret; | |
66 | if (!compat_log) | |
67 | return 0; | |
68 | va_start(ap, fmt); | |
69 | ret = vprintk(fmt, ap); | |
70 | va_end(ap); | |
71 | return ret; | |
72 | } | |
73 | ||
ee0b3e67 BP |
74 | #include "read_write.h" |
75 | ||
1da177e4 LT |
76 | /* |
77 | * Not all architectures have sys_utime, so implement this in terms | |
78 | * of sys_utimes. | |
79 | */ | |
80 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
81 | { | |
82 | struct timeval tv[2]; | |
83 | ||
84 | if (t) { | |
85 | if (get_user(tv[0].tv_sec, &t->actime) || | |
86 | get_user(tv[1].tv_sec, &t->modtime)) | |
87 | return -EFAULT; | |
88 | tv[0].tv_usec = 0; | |
89 | tv[1].tv_usec = 0; | |
90 | } | |
5590ff0d | 91 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL); |
1da177e4 LT |
92 | } |
93 | ||
9ad11ab4 | 94 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 LT |
95 | { |
96 | struct timeval tv[2]; | |
97 | ||
9ad11ab4 | 98 | if (t) { |
1da177e4 LT |
99 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
100 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
101 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
102 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
9ad11ab4 SR |
103 | return -EFAULT; |
104 | } | |
5590ff0d UD |
105 | return do_utimes(dfd, filename, t ? tv : NULL); |
106 | } | |
107 | ||
108 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
109 | { | |
110 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
111 | } |
112 | ||
113 | asmlinkage long compat_sys_newstat(char __user * filename, | |
114 | struct compat_stat __user *statbuf) | |
115 | { | |
116 | struct kstat stat; | |
5590ff0d | 117 | int error = vfs_stat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
118 | |
119 | if (!error) | |
120 | error = cp_compat_stat(&stat, statbuf); | |
121 | return error; | |
122 | } | |
123 | ||
124 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
125 | struct compat_stat __user *statbuf) | |
126 | { | |
127 | struct kstat stat; | |
5590ff0d | 128 | int error = vfs_lstat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
129 | |
130 | if (!error) | |
131 | error = cp_compat_stat(&stat, statbuf); | |
132 | return error; | |
133 | } | |
134 | ||
82d821dd | 135 | #ifndef __ARCH_WANT_STAT64 |
9ad11ab4 | 136 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
137 | struct compat_stat __user *statbuf, int flag) |
138 | { | |
139 | struct kstat stat; | |
140 | int error = -EINVAL; | |
141 | ||
142 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
143 | goto out; | |
144 | ||
145 | if (flag & AT_SYMLINK_NOFOLLOW) | |
146 | error = vfs_lstat_fd(dfd, filename, &stat); | |
147 | else | |
148 | error = vfs_stat_fd(dfd, filename, &stat); | |
149 | ||
150 | if (!error) | |
151 | error = cp_compat_stat(&stat, statbuf); | |
152 | ||
153 | out: | |
154 | return error; | |
155 | } | |
82d821dd | 156 | #endif |
5590ff0d | 157 | |
1da177e4 LT |
158 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
159 | struct compat_stat __user * statbuf) | |
160 | { | |
161 | struct kstat stat; | |
162 | int error = vfs_fstat(fd, &stat); | |
163 | ||
164 | if (!error) | |
165 | error = cp_compat_stat(&stat, statbuf); | |
166 | return error; | |
167 | } | |
168 | ||
169 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
170 | { | |
171 | ||
172 | if (sizeof ubuf->f_blocks == 4) { | |
173 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
174 | 0xffffffff00000000ULL) | |
175 | return -EOVERFLOW; | |
176 | /* f_files and f_ffree may be -1; it's okay | |
177 | * to stuff that into 32 bits */ | |
178 | if (kbuf->f_files != 0xffffffffffffffffULL | |
179 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
180 | return -EOVERFLOW; | |
181 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
182 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
183 | return -EOVERFLOW; | |
184 | } | |
185 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
186 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
187 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
188 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
189 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
190 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
191 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
192 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
193 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
194 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
195 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
196 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
197 | __put_user(0, &ubuf->f_spare[0]) || | |
198 | __put_user(0, &ubuf->f_spare[1]) || | |
199 | __put_user(0, &ubuf->f_spare[2]) || | |
200 | __put_user(0, &ubuf->f_spare[3]) || | |
201 | __put_user(0, &ubuf->f_spare[4])) | |
202 | return -EFAULT; | |
203 | return 0; | |
204 | } | |
205 | ||
206 | /* | |
207 | * The following statfs calls are copies of code from fs/open.c and | |
208 | * should be checked against those from time to time | |
209 | */ | |
210 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
211 | { | |
212 | struct nameidata nd; | |
213 | int error; | |
214 | ||
215 | error = user_path_walk(path, &nd); | |
216 | if (!error) { | |
217 | struct kstatfs tmp; | |
726c3342 | 218 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
219 | if (!error) |
220 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
221 | path_release(&nd); |
222 | } | |
223 | return error; | |
224 | } | |
225 | ||
226 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
227 | { | |
228 | struct file * file; | |
229 | struct kstatfs tmp; | |
230 | int error; | |
231 | ||
232 | error = -EBADF; | |
233 | file = fget(fd); | |
234 | if (!file) | |
235 | goto out; | |
0f7fc9e4 | 236 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
237 | if (!error) |
238 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
239 | fput(file); |
240 | out: | |
241 | return error; | |
242 | } | |
243 | ||
244 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
245 | { | |
246 | if (sizeof ubuf->f_blocks == 4) { | |
247 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
248 | 0xffffffff00000000ULL) | |
249 | return -EOVERFLOW; | |
250 | /* f_files and f_ffree may be -1; it's okay | |
251 | * to stuff that into 32 bits */ | |
252 | if (kbuf->f_files != 0xffffffffffffffffULL | |
253 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
254 | return -EOVERFLOW; | |
255 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
256 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
257 | return -EOVERFLOW; | |
258 | } | |
259 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
260 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
261 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
262 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
263 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
264 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
265 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
266 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
267 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
268 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
269 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
270 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
271 | return -EFAULT; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
276 | { | |
277 | struct nameidata nd; | |
278 | int error; | |
279 | ||
280 | if (sz != sizeof(*buf)) | |
281 | return -EINVAL; | |
282 | ||
283 | error = user_path_walk(path, &nd); | |
284 | if (!error) { | |
285 | struct kstatfs tmp; | |
726c3342 | 286 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
287 | if (!error) |
288 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
289 | path_release(&nd); |
290 | } | |
291 | return error; | |
292 | } | |
293 | ||
294 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
295 | { | |
296 | struct file * file; | |
297 | struct kstatfs tmp; | |
298 | int error; | |
299 | ||
300 | if (sz != sizeof(*buf)) | |
301 | return -EINVAL; | |
302 | ||
303 | error = -EBADF; | |
304 | file = fget(fd); | |
305 | if (!file) | |
306 | goto out; | |
0f7fc9e4 | 307 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
308 | if (!error) |
309 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
310 | fput(file); |
311 | out: | |
312 | return error; | |
313 | } | |
314 | ||
315 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
316 | ||
317 | #define IOCTL_HASHSIZE 256 | |
318 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
1da177e4 | 319 | |
1da177e4 LT |
320 | static inline unsigned long ioctl32_hash(unsigned long cmd) |
321 | { | |
322 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
323 | } | |
324 | ||
325 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
326 | { | |
327 | unsigned long hash; | |
328 | struct ioctl_trans *t; | |
329 | ||
330 | hash = ioctl32_hash (trans->cmd); | |
331 | if (!ioctl32_hash_table[hash]) | |
332 | ioctl32_hash_table[hash] = trans; | |
333 | else { | |
334 | t = ioctl32_hash_table[hash]; | |
335 | while (t->next) | |
336 | t = t->next; | |
337 | trans->next = NULL; | |
338 | t->next = trans; | |
339 | } | |
340 | } | |
341 | ||
342 | static int __init init_sys32_ioctl(void) | |
343 | { | |
344 | int i; | |
345 | ||
346 | for (i = 0; i < ioctl_table_size; i++) { | |
347 | if (ioctl_start[i].next != 0) { | |
348 | printk("ioctl translation %d bad\n",i); | |
349 | return -1; | |
350 | } | |
351 | ||
352 | ioctl32_insert_translation(&ioctl_start[i]); | |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
357 | __initcall(init_sys32_ioctl); | |
358 | ||
1da177e4 LT |
359 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
360 | unsigned int cmd, unsigned long arg) | |
361 | { | |
362 | char buf[10]; | |
363 | char *fn = "?"; | |
364 | char *path; | |
365 | ||
366 | /* find the name of the device. */ | |
367 | path = (char *)__get_free_page(GFP_KERNEL); | |
368 | if (path) { | |
0f7fc9e4 | 369 | fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE); |
1da177e4 LT |
370 | if (IS_ERR(fn)) |
371 | fn = "?"; | |
372 | } | |
373 | ||
a106009b | 374 | sprintf(buf,"'%c'", (cmd>>_IOC_TYPESHIFT) & _IOC_TYPEMASK); |
1da177e4 LT |
375 | if (!isprint(buf[1])) |
376 | sprintf(buf, "%02x", buf[1]); | |
bebfa101 | 377 | compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
a106009b | 378 | "cmd(%08x){t:%s;sz:%u} arg(%08x) on %s\n", |
1da177e4 LT |
379 | current->comm, current->pid, |
380 | (int)fd, (unsigned int)cmd, buf, | |
a106009b | 381 | (cmd >> _IOC_SIZESHIFT) & _IOC_SIZEMASK, |
1da177e4 LT |
382 | (unsigned int)arg, fn); |
383 | ||
384 | if (path) | |
385 | free_page((unsigned long)path); | |
386 | } | |
387 | ||
388 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
389 | unsigned long arg) | |
390 | { | |
391 | struct file *filp; | |
392 | int error = -EBADF; | |
393 | struct ioctl_trans *t; | |
394 | int fput_needed; | |
395 | ||
396 | filp = fget_light(fd, &fput_needed); | |
397 | if (!filp) | |
398 | goto out; | |
399 | ||
400 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
401 | error = security_file_ioctl(filp, cmd, arg); | |
402 | if (error) | |
403 | goto out_fput; | |
404 | ||
405 | /* | |
406 | * To allow the compat_ioctl handlers to be self contained | |
407 | * we need to check the common ioctls here first. | |
408 | * Just handle them with the standard handlers below. | |
409 | */ | |
410 | switch (cmd) { | |
411 | case FIOCLEX: | |
412 | case FIONCLEX: | |
413 | case FIONBIO: | |
414 | case FIOASYNC: | |
415 | case FIOQSIZE: | |
416 | break; | |
417 | ||
418 | case FIBMAP: | |
419 | case FIGETBSZ: | |
420 | case FIONREAD: | |
0f7fc9e4 | 421 | if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) |
1da177e4 LT |
422 | break; |
423 | /*FALL THROUGH*/ | |
424 | ||
425 | default: | |
426 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
427 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
428 | if (error != -ENOIOCTLCMD) | |
429 | goto out_fput; | |
430 | } | |
431 | ||
432 | if (!filp->f_op || | |
433 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
434 | goto do_ioctl; | |
435 | break; | |
436 | } | |
437 | ||
1da177e4 LT |
438 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
439 | if (t->cmd == cmd) | |
440 | goto found_handler; | |
441 | } | |
1da177e4 | 442 | |
0f7fc9e4 | 443 | if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) && |
1da177e4 LT |
444 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
445 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
446 | } else { | |
447 | static int count; | |
448 | ||
449 | if (++count <= 50) | |
450 | compat_ioctl_error(filp, fd, cmd, arg); | |
451 | error = -EINVAL; | |
452 | } | |
453 | ||
454 | goto out_fput; | |
455 | ||
456 | found_handler: | |
457 | if (t->handler) { | |
458 | lock_kernel(); | |
459 | error = t->handler(fd, cmd, arg, filp); | |
460 | unlock_kernel(); | |
1da177e4 LT |
461 | goto out_fput; |
462 | } | |
463 | ||
1da177e4 LT |
464 | do_ioctl: |
465 | error = vfs_ioctl(filp, fd, cmd, arg); | |
466 | out_fput: | |
467 | fput_light(filp, fput_needed); | |
468 | out: | |
469 | return error; | |
470 | } | |
471 | ||
472 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
473 | { | |
474 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
475 | __get_user(kfl->l_type, &ufl->l_type) || | |
476 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
477 | __get_user(kfl->l_start, &ufl->l_start) || | |
478 | __get_user(kfl->l_len, &ufl->l_len) || | |
479 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
480 | return -EFAULT; | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
485 | { | |
486 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
487 | __put_user(kfl->l_type, &ufl->l_type) || | |
488 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
489 | __put_user(kfl->l_start, &ufl->l_start) || | |
490 | __put_user(kfl->l_len, &ufl->l_len) || | |
491 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
492 | return -EFAULT; | |
493 | return 0; | |
494 | } | |
495 | ||
496 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
497 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
498 | { | |
499 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
500 | __get_user(kfl->l_type, &ufl->l_type) || | |
501 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
502 | __get_user(kfl->l_start, &ufl->l_start) || | |
503 | __get_user(kfl->l_len, &ufl->l_len) || | |
504 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
505 | return -EFAULT; | |
506 | return 0; | |
507 | } | |
508 | #endif | |
509 | ||
510 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
511 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
512 | { | |
513 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
514 | __put_user(kfl->l_type, &ufl->l_type) || | |
515 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
516 | __put_user(kfl->l_start, &ufl->l_start) || | |
517 | __put_user(kfl->l_len, &ufl->l_len) || | |
518 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
519 | return -EFAULT; | |
520 | return 0; | |
521 | } | |
522 | #endif | |
523 | ||
524 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
525 | unsigned long arg) | |
526 | { | |
527 | mm_segment_t old_fs; | |
528 | struct flock f; | |
529 | long ret; | |
530 | ||
531 | switch (cmd) { | |
532 | case F_GETLK: | |
533 | case F_SETLK: | |
534 | case F_SETLKW: | |
535 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
536 | if (ret != 0) | |
537 | break; | |
538 | old_fs = get_fs(); | |
539 | set_fs(KERNEL_DS); | |
540 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
541 | set_fs(old_fs); | |
542 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
543 | /* GETLK was successfule and we need to return the data... |
544 | * but it needs to fit in the compat structure. | |
545 | * l_start shouldn't be too big, unless the original | |
546 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
547 | * case the app was asking for trouble, so we return | |
548 | * -EOVERFLOW in that case. | |
549 | * l_len could be too big, in which case we just truncate it, | |
550 | * and only allow the app to see that part of the conflicting | |
551 | * lock that might make sense to it anyway | |
552 | */ | |
553 | ||
554 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 555 | ret = -EOVERFLOW; |
2520f14c N |
556 | if (f.l_len > COMPAT_OFF_T_MAX) |
557 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
558 | if (ret == 0) |
559 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
560 | } | |
561 | break; | |
562 | ||
563 | case F_GETLK64: | |
564 | case F_SETLK64: | |
565 | case F_SETLKW64: | |
566 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
567 | if (ret != 0) | |
568 | break; | |
569 | old_fs = get_fs(); | |
570 | set_fs(KERNEL_DS); | |
571 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
572 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
573 | (unsigned long)&f); | |
574 | set_fs(old_fs); | |
575 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
576 | /* need to return lock information - see above for commentary */ |
577 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 578 | ret = -EOVERFLOW; |
2520f14c N |
579 | if (f.l_len > COMPAT_LOFF_T_MAX) |
580 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
581 | if (ret == 0) |
582 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
583 | } | |
584 | break; | |
585 | ||
586 | default: | |
587 | ret = sys_fcntl(fd, cmd, arg); | |
588 | break; | |
589 | } | |
590 | return ret; | |
591 | } | |
592 | ||
593 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
594 | unsigned long arg) | |
595 | { | |
596 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
597 | return -EINVAL; | |
598 | return compat_sys_fcntl64(fd, cmd, arg); | |
599 | } | |
600 | ||
601 | asmlinkage long | |
602 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
603 | { | |
604 | long ret; | |
605 | aio_context_t ctx64; | |
606 | ||
607 | mm_segment_t oldfs = get_fs(); | |
608 | if (unlikely(get_user(ctx64, ctx32p))) | |
609 | return -EFAULT; | |
610 | ||
611 | set_fs(KERNEL_DS); | |
612 | /* The __user pointer cast is valid because of the set_fs() */ | |
613 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
614 | set_fs(oldfs); | |
615 | /* truncating is ok because it's a user address */ | |
616 | if (!ret) | |
617 | ret = put_user((u32) ctx64, ctx32p); | |
618 | return ret; | |
619 | } | |
620 | ||
621 | asmlinkage long | |
622 | compat_sys_io_getevents(aio_context_t ctx_id, | |
623 | unsigned long min_nr, | |
624 | unsigned long nr, | |
625 | struct io_event __user *events, | |
626 | struct compat_timespec __user *timeout) | |
627 | { | |
628 | long ret; | |
629 | struct timespec t; | |
630 | struct timespec __user *ut = NULL; | |
631 | ||
632 | ret = -EFAULT; | |
633 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
634 | nr * sizeof(struct io_event)))) | |
635 | goto out; | |
636 | if (timeout) { | |
637 | if (get_compat_timespec(&t, timeout)) | |
638 | goto out; | |
639 | ||
640 | ut = compat_alloc_user_space(sizeof(*ut)); | |
641 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
642 | goto out; | |
643 | } | |
644 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
645 | out: | |
646 | return ret; | |
647 | } | |
648 | ||
649 | static inline long | |
650 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
651 | { | |
652 | compat_uptr_t uptr; | |
653 | int i; | |
654 | ||
655 | for (i = 0; i < nr; ++i) { | |
656 | if (get_user(uptr, ptr32 + i)) | |
657 | return -EFAULT; | |
658 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
659 | return -EFAULT; | |
660 | } | |
661 | return 0; | |
662 | } | |
663 | ||
664 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
665 | ||
666 | asmlinkage long | |
667 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
668 | { | |
669 | struct iocb __user * __user *iocb64; | |
670 | long ret; | |
671 | ||
672 | if (unlikely(nr < 0)) | |
673 | return -EINVAL; | |
674 | ||
675 | if (nr > MAX_AIO_SUBMITS) | |
676 | nr = MAX_AIO_SUBMITS; | |
677 | ||
678 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
679 | ret = copy_iocb(nr, iocb, iocb64); | |
680 | if (!ret) | |
681 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
682 | return ret; | |
683 | } | |
684 | ||
685 | struct compat_ncp_mount_data { | |
686 | compat_int_t version; | |
687 | compat_uint_t ncp_fd; | |
202e5979 | 688 | __compat_uid_t mounted_uid; |
1da177e4 LT |
689 | compat_pid_t wdog_pid; |
690 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
691 | compat_uint_t time_out; | |
692 | compat_uint_t retry_count; | |
693 | compat_uint_t flags; | |
202e5979 SR |
694 | __compat_uid_t uid; |
695 | __compat_gid_t gid; | |
1da177e4 LT |
696 | compat_mode_t file_mode; |
697 | compat_mode_t dir_mode; | |
698 | }; | |
699 | ||
700 | struct compat_ncp_mount_data_v4 { | |
701 | compat_int_t version; | |
702 | compat_ulong_t flags; | |
703 | compat_ulong_t mounted_uid; | |
704 | compat_long_t wdog_pid; | |
705 | compat_uint_t ncp_fd; | |
706 | compat_uint_t time_out; | |
707 | compat_uint_t retry_count; | |
708 | compat_ulong_t uid; | |
709 | compat_ulong_t gid; | |
710 | compat_ulong_t file_mode; | |
711 | compat_ulong_t dir_mode; | |
712 | }; | |
713 | ||
714 | static void *do_ncp_super_data_conv(void *raw_data) | |
715 | { | |
716 | int version = *(unsigned int *)raw_data; | |
717 | ||
718 | if (version == 3) { | |
719 | struct compat_ncp_mount_data *c_n = raw_data; | |
720 | struct ncp_mount_data *n = raw_data; | |
721 | ||
722 | n->dir_mode = c_n->dir_mode; | |
723 | n->file_mode = c_n->file_mode; | |
724 | n->gid = c_n->gid; | |
725 | n->uid = c_n->uid; | |
726 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
727 | n->wdog_pid = c_n->wdog_pid; | |
728 | n->mounted_uid = c_n->mounted_uid; | |
729 | } else if (version == 4) { | |
730 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
731 | struct ncp_mount_data_v4 *n = raw_data; | |
732 | ||
733 | n->dir_mode = c_n->dir_mode; | |
734 | n->file_mode = c_n->file_mode; | |
735 | n->gid = c_n->gid; | |
736 | n->uid = c_n->uid; | |
737 | n->retry_count = c_n->retry_count; | |
738 | n->time_out = c_n->time_out; | |
739 | n->ncp_fd = c_n->ncp_fd; | |
740 | n->wdog_pid = c_n->wdog_pid; | |
741 | n->mounted_uid = c_n->mounted_uid; | |
742 | n->flags = c_n->flags; | |
743 | } else if (version != 5) { | |
744 | return NULL; | |
745 | } | |
746 | ||
747 | return raw_data; | |
748 | } | |
749 | ||
750 | struct compat_smb_mount_data { | |
751 | compat_int_t version; | |
202e5979 SR |
752 | __compat_uid_t mounted_uid; |
753 | __compat_uid_t uid; | |
754 | __compat_gid_t gid; | |
1da177e4 LT |
755 | compat_mode_t file_mode; |
756 | compat_mode_t dir_mode; | |
757 | }; | |
758 | ||
759 | static void *do_smb_super_data_conv(void *raw_data) | |
760 | { | |
761 | struct smb_mount_data *s = raw_data; | |
762 | struct compat_smb_mount_data *c_s = raw_data; | |
763 | ||
764 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
765 | goto out; | |
766 | s->dir_mode = c_s->dir_mode; | |
767 | s->file_mode = c_s->file_mode; | |
768 | s->gid = c_s->gid; | |
769 | s->uid = c_s->uid; | |
770 | s->mounted_uid = c_s->mounted_uid; | |
771 | out: | |
772 | return raw_data; | |
773 | } | |
774 | ||
9a9947bf DH |
775 | struct compat_nfs_string { |
776 | compat_uint_t len; | |
5fc3e624 | 777 | compat_uptr_t data; |
9a9947bf DH |
778 | }; |
779 | ||
780 | static inline void compat_nfs_string(struct nfs_string *dst, | |
781 | struct compat_nfs_string *src) | |
782 | { | |
783 | dst->data = compat_ptr(src->data); | |
784 | dst->len = src->len; | |
785 | } | |
786 | ||
787 | struct compat_nfs4_mount_data_v1 { | |
788 | compat_int_t version; | |
789 | compat_int_t flags; | |
790 | compat_int_t rsize; | |
791 | compat_int_t wsize; | |
792 | compat_int_t timeo; | |
793 | compat_int_t retrans; | |
794 | compat_int_t acregmin; | |
795 | compat_int_t acregmax; | |
796 | compat_int_t acdirmin; | |
797 | compat_int_t acdirmax; | |
798 | struct compat_nfs_string client_addr; | |
799 | struct compat_nfs_string mnt_path; | |
800 | struct compat_nfs_string hostname; | |
801 | compat_uint_t host_addrlen; | |
5fc3e624 | 802 | compat_uptr_t host_addr; |
9a9947bf DH |
803 | compat_int_t proto; |
804 | compat_int_t auth_flavourlen; | |
5fc3e624 | 805 | compat_uptr_t auth_flavours; |
9a9947bf DH |
806 | }; |
807 | ||
808 | static int do_nfs4_super_data_conv(void *raw_data) | |
809 | { | |
810 | int version = *(compat_uint_t *) raw_data; | |
811 | ||
812 | if (version == 1) { | |
813 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
814 | struct nfs4_mount_data *real = raw_data; | |
815 | ||
816 | /* copy the fields backwards */ | |
817 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
818 | real->auth_flavourlen = raw->auth_flavourlen; | |
819 | real->proto = raw->proto; | |
820 | real->host_addr = compat_ptr(raw->host_addr); | |
821 | real->host_addrlen = raw->host_addrlen; | |
822 | compat_nfs_string(&real->hostname, &raw->hostname); | |
823 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
824 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
825 | real->acdirmax = raw->acdirmax; | |
826 | real->acdirmin = raw->acdirmin; | |
827 | real->acregmax = raw->acregmax; | |
828 | real->acregmin = raw->acregmin; | |
829 | real->retrans = raw->retrans; | |
830 | real->timeo = raw->timeo; | |
831 | real->wsize = raw->wsize; | |
832 | real->rsize = raw->rsize; | |
833 | real->flags = raw->flags; | |
834 | real->version = raw->version; | |
835 | } | |
836 | else { | |
837 | return -EINVAL; | |
838 | } | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
1da177e4 LT |
843 | #define SMBFS_NAME "smbfs" |
844 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 845 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
846 | |
847 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
848 | char __user * type, unsigned long flags, | |
849 | void __user * data) | |
850 | { | |
851 | unsigned long type_page; | |
852 | unsigned long data_page; | |
853 | unsigned long dev_page; | |
854 | char *dir_page; | |
855 | int retval; | |
856 | ||
857 | retval = copy_mount_options (type, &type_page); | |
858 | if (retval < 0) | |
859 | goto out; | |
860 | ||
861 | dir_page = getname(dir_name); | |
862 | retval = PTR_ERR(dir_page); | |
863 | if (IS_ERR(dir_page)) | |
864 | goto out1; | |
865 | ||
866 | retval = copy_mount_options (dev_name, &dev_page); | |
867 | if (retval < 0) | |
868 | goto out2; | |
869 | ||
870 | retval = copy_mount_options (data, &data_page); | |
871 | if (retval < 0) | |
872 | goto out3; | |
873 | ||
874 | retval = -EINVAL; | |
875 | ||
822191a2 | 876 | if (type_page && data_page) { |
1da177e4 LT |
877 | if (!strcmp((char *)type_page, SMBFS_NAME)) { |
878 | do_smb_super_data_conv((void *)data_page); | |
879 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
880 | do_ncp_super_data_conv((void *)data_page); | |
9a9947bf DH |
881 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
882 | if (do_nfs4_super_data_conv((void *) data_page)) | |
883 | goto out4; | |
1da177e4 LT |
884 | } |
885 | } | |
886 | ||
887 | lock_kernel(); | |
888 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
889 | flags, (void*)data_page); | |
890 | unlock_kernel(); | |
891 | ||
9a9947bf | 892 | out4: |
1da177e4 LT |
893 | free_page(data_page); |
894 | out3: | |
895 | free_page(dev_page); | |
896 | out2: | |
897 | putname(dir_page); | |
898 | out1: | |
899 | free_page(type_page); | |
900 | out: | |
901 | return retval; | |
902 | } | |
903 | ||
904 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
905 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ | |
906 | ~(sizeof(compat_long_t)-1)) | |
907 | ||
908 | struct compat_old_linux_dirent { | |
909 | compat_ulong_t d_ino; | |
910 | compat_ulong_t d_offset; | |
911 | unsigned short d_namlen; | |
912 | char d_name[1]; | |
913 | }; | |
914 | ||
915 | struct compat_readdir_callback { | |
916 | struct compat_old_linux_dirent __user *dirent; | |
917 | int result; | |
918 | }; | |
919 | ||
920 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 921 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
922 | { |
923 | struct compat_readdir_callback *buf = __buf; | |
924 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 925 | compat_ulong_t d_ino; |
1da177e4 LT |
926 | |
927 | if (buf->result) | |
928 | return -EINVAL; | |
afefdbb2 DH |
929 | d_ino = ino; |
930 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
931 | return -EOVERFLOW; | |
1da177e4 LT |
932 | buf->result++; |
933 | dirent = buf->dirent; | |
934 | if (!access_ok(VERIFY_WRITE, dirent, | |
935 | (unsigned long)(dirent->d_name + namlen + 1) - | |
936 | (unsigned long)dirent)) | |
937 | goto efault; | |
afefdbb2 | 938 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
939 | __put_user(offset, &dirent->d_offset) || |
940 | __put_user(namlen, &dirent->d_namlen) || | |
941 | __copy_to_user(dirent->d_name, name, namlen) || | |
942 | __put_user(0, dirent->d_name + namlen)) | |
943 | goto efault; | |
944 | return 0; | |
945 | efault: | |
946 | buf->result = -EFAULT; | |
947 | return -EFAULT; | |
948 | } | |
949 | ||
950 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
951 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
952 | { | |
953 | int error; | |
954 | struct file *file; | |
955 | struct compat_readdir_callback buf; | |
956 | ||
957 | error = -EBADF; | |
958 | file = fget(fd); | |
959 | if (!file) | |
960 | goto out; | |
961 | ||
962 | buf.result = 0; | |
963 | buf.dirent = dirent; | |
964 | ||
965 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
966 | if (error >= 0) | |
967 | error = buf.result; | |
968 | ||
969 | fput(file); | |
970 | out: | |
971 | return error; | |
972 | } | |
973 | ||
974 | struct compat_linux_dirent { | |
975 | compat_ulong_t d_ino; | |
976 | compat_ulong_t d_off; | |
977 | unsigned short d_reclen; | |
978 | char d_name[1]; | |
979 | }; | |
980 | ||
981 | struct compat_getdents_callback { | |
982 | struct compat_linux_dirent __user *current_dir; | |
983 | struct compat_linux_dirent __user *previous; | |
984 | int count; | |
985 | int error; | |
986 | }; | |
987 | ||
988 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 989 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
990 | { |
991 | struct compat_linux_dirent __user * dirent; | |
992 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 993 | compat_ulong_t d_ino; |
1da177e4 LT |
994 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); |
995 | ||
996 | buf->error = -EINVAL; /* only used if we fail.. */ | |
997 | if (reclen > buf->count) | |
998 | return -EINVAL; | |
afefdbb2 DH |
999 | d_ino = ino; |
1000 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
1001 | return -EOVERFLOW; | |
1da177e4 LT |
1002 | dirent = buf->previous; |
1003 | if (dirent) { | |
1004 | if (__put_user(offset, &dirent->d_off)) | |
1005 | goto efault; | |
1006 | } | |
1007 | dirent = buf->current_dir; | |
afefdbb2 | 1008 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
1009 | goto efault; |
1010 | if (__put_user(reclen, &dirent->d_reclen)) | |
1011 | goto efault; | |
1012 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1013 | goto efault; | |
1014 | if (__put_user(0, dirent->d_name + namlen)) | |
1015 | goto efault; | |
1016 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
1017 | goto efault; | |
1018 | buf->previous = dirent; | |
1019 | dirent = (void __user *)dirent + reclen; | |
1020 | buf->current_dir = dirent; | |
1021 | buf->count -= reclen; | |
1022 | return 0; | |
1023 | efault: | |
1024 | buf->error = -EFAULT; | |
1025 | return -EFAULT; | |
1026 | } | |
1027 | ||
1028 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1029 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1030 | { | |
1031 | struct file * file; | |
1032 | struct compat_linux_dirent __user * lastdirent; | |
1033 | struct compat_getdents_callback buf; | |
1034 | int error; | |
1035 | ||
1036 | error = -EFAULT; | |
1037 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1038 | goto out; | |
1039 | ||
1040 | error = -EBADF; | |
1041 | file = fget(fd); | |
1042 | if (!file) | |
1043 | goto out; | |
1044 | ||
1045 | buf.current_dir = dirent; | |
1046 | buf.previous = NULL; | |
1047 | buf.count = count; | |
1048 | buf.error = 0; | |
1049 | ||
1050 | error = vfs_readdir(file, compat_filldir, &buf); | |
1051 | if (error < 0) | |
1052 | goto out_putf; | |
1053 | error = buf.error; | |
1054 | lastdirent = buf.previous; | |
1055 | if (lastdirent) { | |
1056 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1057 | error = -EFAULT; | |
1058 | else | |
1059 | error = count - buf.count; | |
1060 | } | |
1061 | ||
1062 | out_putf: | |
1063 | fput(file); | |
1064 | out: | |
1065 | return error; | |
1066 | } | |
1067 | ||
1068 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1069 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1070 | ||
1071 | struct compat_getdents_callback64 { | |
1072 | struct linux_dirent64 __user *current_dir; | |
1073 | struct linux_dirent64 __user *previous; | |
1074 | int count; | |
1075 | int error; | |
1076 | }; | |
1077 | ||
1078 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1079 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1080 | { |
1081 | struct linux_dirent64 __user *dirent; | |
1082 | struct compat_getdents_callback64 *buf = __buf; | |
1083 | int jj = NAME_OFFSET(dirent); | |
1084 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1085 | u64 off; | |
1086 | ||
1087 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1088 | if (reclen > buf->count) | |
1089 | return -EINVAL; | |
1090 | dirent = buf->previous; | |
1091 | ||
1092 | if (dirent) { | |
1093 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1094 | goto efault; | |
1095 | } | |
1096 | dirent = buf->current_dir; | |
1097 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1098 | goto efault; | |
1099 | off = 0; | |
1100 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1101 | goto efault; | |
1102 | if (__put_user(reclen, &dirent->d_reclen)) | |
1103 | goto efault; | |
1104 | if (__put_user(d_type, &dirent->d_type)) | |
1105 | goto efault; | |
1106 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1107 | goto efault; | |
1108 | if (__put_user(0, dirent->d_name + namlen)) | |
1109 | goto efault; | |
1110 | buf->previous = dirent; | |
1111 | dirent = (void __user *)dirent + reclen; | |
1112 | buf->current_dir = dirent; | |
1113 | buf->count -= reclen; | |
1114 | return 0; | |
1115 | efault: | |
1116 | buf->error = -EFAULT; | |
1117 | return -EFAULT; | |
1118 | } | |
1119 | ||
1120 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1121 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1122 | { | |
1123 | struct file * file; | |
1124 | struct linux_dirent64 __user * lastdirent; | |
1125 | struct compat_getdents_callback64 buf; | |
1126 | int error; | |
1127 | ||
1128 | error = -EFAULT; | |
1129 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1130 | goto out; | |
1131 | ||
1132 | error = -EBADF; | |
1133 | file = fget(fd); | |
1134 | if (!file) | |
1135 | goto out; | |
1136 | ||
1137 | buf.current_dir = dirent; | |
1138 | buf.previous = NULL; | |
1139 | buf.count = count; | |
1140 | buf.error = 0; | |
1141 | ||
1142 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1143 | if (error < 0) | |
1144 | goto out_putf; | |
1145 | error = buf.error; | |
1146 | lastdirent = buf.previous; | |
1147 | if (lastdirent) { | |
1148 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 HC |
1149 | error = -EFAULT; |
1150 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) | |
1151 | goto out_putf; | |
1da177e4 LT |
1152 | error = count - buf.count; |
1153 | } | |
1154 | ||
1155 | out_putf: | |
1156 | fput(file); | |
1157 | out: | |
1158 | return error; | |
1159 | } | |
1160 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1161 | ||
1162 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1163 | const struct compat_iovec __user *uvector, | |
1164 | unsigned long nr_segs, loff_t *pos) | |
1165 | { | |
1da177e4 LT |
1166 | compat_ssize_t tot_len; |
1167 | struct iovec iovstack[UIO_FASTIOV]; | |
1168 | struct iovec *iov=iovstack, *vector; | |
1169 | ssize_t ret; | |
1170 | int seg; | |
1171 | io_fn_t fn; | |
1172 | iov_fn_t fnv; | |
1173 | ||
1174 | /* | |
1175 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1176 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1177 | * traditionally returned zero for zero segments, so... | |
1178 | */ | |
1179 | ret = 0; | |
1180 | if (nr_segs == 0) | |
1181 | goto out; | |
1182 | ||
1183 | /* | |
1184 | * First get the "struct iovec" from user memory and | |
1185 | * verify all the pointers | |
1186 | */ | |
1187 | ret = -EINVAL; | |
1188 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1189 | goto out; | |
1190 | if (!file->f_op) | |
1191 | goto out; | |
1192 | if (nr_segs > UIO_FASTIOV) { | |
1193 | ret = -ENOMEM; | |
1194 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1195 | if (!iov) | |
1196 | goto out; | |
1197 | } | |
1198 | ret = -EFAULT; | |
1199 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1200 | goto out; | |
1201 | ||
1202 | /* | |
1203 | * Single unix specification: | |
1204 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1205 | * ssize_t. The total length is fitting an ssize_t | |
1206 | * | |
1207 | * Be careful here because iov_len is a size_t not an ssize_t | |
1208 | */ | |
1209 | tot_len = 0; | |
1210 | vector = iov; | |
1211 | ret = -EINVAL; | |
1212 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1213 | compat_ssize_t tmp = tot_len; | |
1214 | compat_ssize_t len; | |
1215 | compat_uptr_t buf; | |
1216 | ||
1217 | if (__get_user(len, &uvector->iov_len) || | |
1218 | __get_user(buf, &uvector->iov_base)) { | |
1219 | ret = -EFAULT; | |
1220 | goto out; | |
1221 | } | |
1222 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1223 | goto out; | |
1224 | tot_len += len; | |
1225 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1226 | goto out; | |
1227 | vector->iov_base = compat_ptr(buf); | |
1228 | vector->iov_len = (compat_size_t) len; | |
1229 | uvector++; | |
1230 | vector++; | |
1231 | } | |
1232 | if (tot_len == 0) { | |
1233 | ret = 0; | |
1234 | goto out; | |
1235 | } | |
1236 | ||
1237 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1238 | if (ret < 0) |
1da177e4 LT |
1239 | goto out; |
1240 | ||
e7edf9cd JM |
1241 | ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); |
1242 | if (ret) | |
1243 | goto out; | |
1244 | ||
1da177e4 LT |
1245 | fnv = NULL; |
1246 | if (type == READ) { | |
1247 | fn = file->f_op->read; | |
ee0b3e67 | 1248 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1249 | } else { |
1250 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1251 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1252 | } |
1253 | ||
ee0b3e67 BP |
1254 | if (fnv) |
1255 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1256 | pos, fnv); | |
1257 | else | |
1258 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1259 | |
1da177e4 LT |
1260 | out: |
1261 | if (iov != iovstack) | |
1262 | kfree(iov); | |
0eeca283 | 1263 | if ((ret + (type == READ)) > 0) { |
0f7fc9e4 | 1264 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
1265 | if (type == READ) |
1266 | fsnotify_access(dentry); | |
1267 | else | |
1268 | fsnotify_modify(dentry); | |
1269 | } | |
1da177e4 LT |
1270 | return ret; |
1271 | } | |
1272 | ||
1273 | asmlinkage ssize_t | |
1274 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1275 | { | |
1276 | struct file *file; | |
1277 | ssize_t ret = -EBADF; | |
1278 | ||
1279 | file = fget(fd); | |
1280 | if (!file) | |
1281 | return -EBADF; | |
1282 | ||
1283 | if (!(file->f_mode & FMODE_READ)) | |
1284 | goto out; | |
1285 | ||
1286 | ret = -EINVAL; | |
ee0b3e67 | 1287 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1288 | goto out; |
1289 | ||
1290 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1291 | ||
1292 | out: | |
1293 | fput(file); | |
1294 | return ret; | |
1295 | } | |
1296 | ||
1297 | asmlinkage ssize_t | |
1298 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1299 | { | |
1300 | struct file *file; | |
1301 | ssize_t ret = -EBADF; | |
1302 | ||
1303 | file = fget(fd); | |
1304 | if (!file) | |
1305 | return -EBADF; | |
1306 | if (!(file->f_mode & FMODE_WRITE)) | |
1307 | goto out; | |
1308 | ||
1309 | ret = -EINVAL; | |
ee0b3e67 | 1310 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1311 | goto out; |
1312 | ||
1313 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1314 | ||
1315 | out: | |
1316 | fput(file); | |
1317 | return ret; | |
1318 | } | |
1319 | ||
d2610202 AK |
1320 | asmlinkage long |
1321 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1322 | unsigned int nr_segs, unsigned int flags) | |
1323 | { | |
1324 | unsigned i; | |
90cbad65 | 1325 | struct iovec __user *iov; |
98232d50 | 1326 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1327 | return -EINVAL; |
1328 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1329 | for (i = 0; i < nr_segs; i++) { | |
1330 | struct compat_iovec v; | |
1331 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1332 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1333 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1334 | put_user(v.iov_len, &iov[i].iov_len)) | |
1335 | return -EFAULT; | |
1336 | } | |
1337 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1338 | } | |
1339 | ||
e922efc3 MS |
1340 | /* |
1341 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1342 | * O_LARGEFILE flag. | |
1343 | */ | |
1344 | asmlinkage long | |
1345 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1346 | { | |
5590ff0d UD |
1347 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1352 | * O_LARGEFILE flag. | |
1353 | */ | |
1354 | asmlinkage long | |
9ad11ab4 | 1355 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1356 | { |
1357 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1358 | } |
1359 | ||
1da177e4 LT |
1360 | /* |
1361 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1362 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1363 | * and envp pointers. | |
1364 | */ | |
1365 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1366 | { | |
1367 | int i = 0; | |
1368 | ||
1369 | if (argv != NULL) { | |
1370 | for (;;) { | |
1371 | compat_uptr_t p; | |
1372 | ||
1373 | if (get_user(p, argv)) | |
1374 | return -EFAULT; | |
1375 | if (!p) | |
1376 | break; | |
1377 | argv++; | |
1378 | if(++i > max) | |
1379 | return -E2BIG; | |
1380 | } | |
1381 | } | |
1382 | return i; | |
1383 | } | |
1384 | ||
1385 | /* | |
1386 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1387 | * except that it works with 32 bit argv and envp pointers. | |
1388 | */ | |
1389 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1390 | struct linux_binprm *bprm) | |
1391 | { | |
1392 | struct page *kmapped_page = NULL; | |
1393 | char *kaddr = NULL; | |
1394 | int ret; | |
1395 | ||
1396 | while (argc-- > 0) { | |
1397 | compat_uptr_t str; | |
1398 | int len; | |
1399 | unsigned long pos; | |
1400 | ||
1401 | if (get_user(str, argv+argc) || | |
1402 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1403 | ret = -EFAULT; | |
1404 | goto out; | |
1405 | } | |
1406 | ||
1407 | if (bprm->p < len) { | |
1408 | ret = -E2BIG; | |
1409 | goto out; | |
1410 | } | |
1411 | ||
1412 | bprm->p -= len; | |
1413 | /* XXX: add architecture specific overflow check here. */ | |
1414 | pos = bprm->p; | |
1415 | ||
1416 | while (len > 0) { | |
1417 | int i, new, err; | |
1418 | int offset, bytes_to_copy; | |
1419 | struct page *page; | |
1420 | ||
1421 | offset = pos % PAGE_SIZE; | |
1422 | i = pos/PAGE_SIZE; | |
1423 | page = bprm->page[i]; | |
1424 | new = 0; | |
1425 | if (!page) { | |
1426 | page = alloc_page(GFP_HIGHUSER); | |
1427 | bprm->page[i] = page; | |
1428 | if (!page) { | |
1429 | ret = -ENOMEM; | |
1430 | goto out; | |
1431 | } | |
1432 | new = 1; | |
1433 | } | |
1434 | ||
1435 | if (page != kmapped_page) { | |
1436 | if (kmapped_page) | |
1437 | kunmap(kmapped_page); | |
1438 | kmapped_page = page; | |
1439 | kaddr = kmap(kmapped_page); | |
1440 | } | |
1441 | if (new && offset) | |
1442 | memset(kaddr, 0, offset); | |
1443 | bytes_to_copy = PAGE_SIZE - offset; | |
1444 | if (bytes_to_copy > len) { | |
1445 | bytes_to_copy = len; | |
1446 | if (new) | |
1447 | memset(kaddr+offset+len, 0, | |
1448 | PAGE_SIZE-offset-len); | |
1449 | } | |
1450 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1451 | bytes_to_copy); | |
1452 | if (err) { | |
1453 | ret = -EFAULT; | |
1454 | goto out; | |
1455 | } | |
1456 | ||
1457 | pos += bytes_to_copy; | |
1458 | str += bytes_to_copy; | |
1459 | len -= bytes_to_copy; | |
1460 | } | |
1461 | } | |
1462 | ret = 0; | |
1463 | out: | |
1464 | if (kmapped_page) | |
1465 | kunmap(kmapped_page); | |
1466 | return ret; | |
1467 | } | |
1468 | ||
1469 | #ifdef CONFIG_MMU | |
1470 | ||
1471 | #define free_arg_pages(bprm) do { } while (0) | |
1472 | ||
1473 | #else | |
1474 | ||
1475 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1476 | { | |
1477 | int i; | |
1478 | ||
1479 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1480 | if (bprm->page[i]) | |
1481 | __free_page(bprm->page[i]); | |
1482 | bprm->page[i] = NULL; | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | #endif /* CONFIG_MMU */ | |
1487 | ||
1488 | /* | |
1489 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1490 | * that it processes 32 bit argv and envp pointers. | |
1491 | */ | |
1492 | int compat_do_execve(char * filename, | |
1493 | compat_uptr_t __user *argv, | |
1494 | compat_uptr_t __user *envp, | |
1495 | struct pt_regs * regs) | |
1496 | { | |
1497 | struct linux_binprm *bprm; | |
1498 | struct file *file; | |
1499 | int retval; | |
1500 | int i; | |
1501 | ||
1502 | retval = -ENOMEM; | |
11b0b5ab | 1503 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 LT |
1504 | if (!bprm) |
1505 | goto out_ret; | |
1da177e4 LT |
1506 | |
1507 | file = open_exec(filename); | |
1508 | retval = PTR_ERR(file); | |
1509 | if (IS_ERR(file)) | |
1510 | goto out_kfree; | |
1511 | ||
1512 | sched_exec(); | |
1513 | ||
1514 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1515 | bprm->file = file; | |
1516 | bprm->filename = filename; | |
1517 | bprm->interp = filename; | |
1518 | bprm->mm = mm_alloc(); | |
1519 | retval = -ENOMEM; | |
1520 | if (!bprm->mm) | |
1521 | goto out_file; | |
1522 | ||
1523 | retval = init_new_context(current, bprm->mm); | |
1524 | if (retval < 0) | |
1525 | goto out_mm; | |
1526 | ||
1527 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1528 | if ((retval = bprm->argc) < 0) | |
1529 | goto out_mm; | |
1530 | ||
1531 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1532 | if ((retval = bprm->envc) < 0) | |
1533 | goto out_mm; | |
1534 | ||
1535 | retval = security_bprm_alloc(bprm); | |
1536 | if (retval) | |
1537 | goto out; | |
1538 | ||
1539 | retval = prepare_binprm(bprm); | |
1540 | if (retval < 0) | |
1541 | goto out; | |
1542 | ||
1543 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1544 | if (retval < 0) | |
1545 | goto out; | |
1546 | ||
1547 | bprm->exec = bprm->p; | |
1548 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1549 | if (retval < 0) | |
1550 | goto out; | |
1551 | ||
1552 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1553 | if (retval < 0) | |
1554 | goto out; | |
1555 | ||
1556 | retval = search_binary_handler(bprm, regs); | |
1557 | if (retval >= 0) { | |
1558 | free_arg_pages(bprm); | |
1559 | ||
1560 | /* execve success */ | |
1561 | security_bprm_free(bprm); | |
4a805e86 | 1562 | acct_update_integrals(current); |
1da177e4 LT |
1563 | kfree(bprm); |
1564 | return retval; | |
1565 | } | |
1566 | ||
1567 | out: | |
1568 | /* Something went wrong, return the inode and free the argument pages*/ | |
1569 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1570 | struct page * page = bprm->page[i]; | |
1571 | if (page) | |
1572 | __free_page(page); | |
1573 | } | |
1574 | ||
1575 | if (bprm->security) | |
1576 | security_bprm_free(bprm); | |
1577 | ||
1578 | out_mm: | |
1579 | if (bprm->mm) | |
1580 | mmdrop(bprm->mm); | |
1581 | ||
1582 | out_file: | |
1583 | if (bprm->file) { | |
1584 | allow_write_access(bprm->file); | |
1585 | fput(bprm->file); | |
1586 | } | |
1587 | ||
1588 | out_kfree: | |
1589 | kfree(bprm); | |
1590 | ||
1591 | out_ret: | |
1592 | return retval; | |
1593 | } | |
1594 | ||
1595 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1596 | ||
1597 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1598 | ||
1599 | /* | |
1600 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1601 | * 64-bit unsigned longs. | |
1602 | */ | |
858119e1 | 1603 | static |
1da177e4 LT |
1604 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1605 | unsigned long *fdset) | |
1606 | { | |
1607 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1608 | if (ufdset) { | |
1609 | unsigned long odd; | |
1610 | ||
1611 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1612 | return -EFAULT; | |
1613 | ||
1614 | odd = nr & 1UL; | |
1615 | nr &= ~1UL; | |
1616 | while (nr) { | |
1617 | unsigned long h, l; | |
7116e994 HC |
1618 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1619 | return -EFAULT; | |
1da177e4 LT |
1620 | ufdset += 2; |
1621 | *fdset++ = h << 32 | l; | |
1622 | nr -= 2; | |
1623 | } | |
7116e994 HC |
1624 | if (odd && __get_user(*fdset, ufdset)) |
1625 | return -EFAULT; | |
1da177e4 LT |
1626 | } else { |
1627 | /* Tricky, must clear full unsigned long in the | |
1628 | * kernel fdset at the end, this makes sure that | |
1629 | * actually happens. | |
1630 | */ | |
1631 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1632 | } | |
1633 | return 0; | |
1634 | } | |
1635 | ||
858119e1 | 1636 | static |
7116e994 HC |
1637 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1638 | unsigned long *fdset) | |
1da177e4 LT |
1639 | { |
1640 | unsigned long odd; | |
1641 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1642 | ||
1643 | if (!ufdset) | |
7116e994 | 1644 | return 0; |
1da177e4 LT |
1645 | |
1646 | odd = nr & 1UL; | |
1647 | nr &= ~1UL; | |
1648 | while (nr) { | |
1649 | unsigned long h, l; | |
1650 | l = *fdset++; | |
1651 | h = l >> 32; | |
7116e994 HC |
1652 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1653 | return -EFAULT; | |
1da177e4 LT |
1654 | ufdset += 2; |
1655 | nr -= 2; | |
1656 | } | |
7116e994 HC |
1657 | if (odd && __put_user(*fdset, ufdset)) |
1658 | return -EFAULT; | |
1659 | return 0; | |
1da177e4 LT |
1660 | } |
1661 | ||
1662 | ||
1663 | /* | |
1664 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1665 | * should be compared to it from time to time | |
1666 | */ | |
1da177e4 LT |
1667 | |
1668 | /* | |
1669 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1670 | * like to be certain this leads to no problems. So I return | |
1671 | * EINTR just for safety. | |
1672 | * | |
1673 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1674 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1675 | */ | |
1676 | #define MAX_SELECT_SECONDS \ | |
1677 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1678 | ||
9f72949f DW |
1679 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1680 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) | |
1da177e4 LT |
1681 | { |
1682 | fd_set_bits fds; | |
1683 | char *bits; | |
bbea9f69 | 1684 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1685 | struct fdtable *fdt; |
1da177e4 | 1686 | |
1da177e4 LT |
1687 | if (n < 0) |
1688 | goto out_nofds; | |
1689 | ||
bbea9f69 | 1690 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1691 | rcu_read_lock(); |
a4531edd | 1692 | fdt = files_fdtable(current->files); |
bbea9f69 | 1693 | max_fds = fdt->max_fds; |
ac5b8b6f | 1694 | rcu_read_unlock(); |
bbea9f69 VL |
1695 | if (n > max_fds) |
1696 | n = max_fds; | |
1da177e4 LT |
1697 | |
1698 | /* | |
1699 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1700 | * since we used fdset we need to allocate memory in units of | |
1701 | * long-words. | |
1702 | */ | |
1703 | ret = -ENOMEM; | |
1704 | size = FDS_BYTES(n); | |
68c3431a | 1705 | bits = kmalloc(6 * size, GFP_KERNEL); |
1da177e4 LT |
1706 | if (!bits) |
1707 | goto out_nofds; | |
1708 | fds.in = (unsigned long *) bits; | |
1709 | fds.out = (unsigned long *) (bits + size); | |
1710 | fds.ex = (unsigned long *) (bits + 2*size); | |
1711 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1712 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1713 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1714 | ||
1715 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1716 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1717 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1718 | goto out; | |
1719 | zero_fd_set(n, fds.res_in); | |
1720 | zero_fd_set(n, fds.res_out); | |
1721 | zero_fd_set(n, fds.res_ex); | |
1722 | ||
9f72949f | 1723 | ret = do_select(n, &fds, timeout); |
1da177e4 LT |
1724 | |
1725 | if (ret < 0) | |
1726 | goto out; | |
1727 | if (!ret) { | |
1728 | ret = -ERESTARTNOHAND; | |
1729 | if (signal_pending(current)) | |
1730 | goto out; | |
1731 | ret = 0; | |
1732 | } | |
1733 | ||
7116e994 HC |
1734 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1735 | compat_set_fd_set(n, outp, fds.res_out) || | |
1736 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1737 | ret = -EFAULT; | |
1da177e4 | 1738 | out: |
68c3431a | 1739 | kfree(bits); |
1da177e4 LT |
1740 | out_nofds: |
1741 | return ret; | |
1742 | } | |
1743 | ||
9f72949f DW |
1744 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1745 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1746 | struct compat_timeval __user *tvp) | |
1747 | { | |
1748 | s64 timeout = -1; | |
1749 | struct compat_timeval tv; | |
1750 | int ret; | |
1751 | ||
1752 | if (tvp) { | |
1753 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1754 | return -EFAULT; | |
1755 | ||
1756 | if (tv.tv_sec < 0 || tv.tv_usec < 0) | |
1757 | return -EINVAL; | |
1758 | ||
1759 | /* Cast to u64 to make GCC stop complaining */ | |
1760 | if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) | |
1761 | timeout = -1; /* infinite */ | |
1762 | else { | |
7e732bfc | 1763 | timeout = ROUND_UP(tv.tv_usec, 1000000/HZ); |
9f72949f DW |
1764 | timeout += tv.tv_sec * HZ; |
1765 | } | |
1766 | } | |
1767 | ||
1768 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1769 | ||
1770 | if (tvp) { | |
643a6545 AM |
1771 | struct compat_timeval rtv; |
1772 | ||
9f72949f DW |
1773 | if (current->personality & STICKY_TIMEOUTS) |
1774 | goto sticky; | |
643a6545 AM |
1775 | rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)); |
1776 | rtv.tv_sec = timeout; | |
74910e6c | 1777 | if (compat_timeval_compare(&rtv, &tv) >= 0) |
643a6545 AM |
1778 | rtv = tv; |
1779 | if (copy_to_user(tvp, &rtv, sizeof(rtv))) { | |
9f72949f DW |
1780 | sticky: |
1781 | /* | |
1782 | * If an application puts its timeval in read-only | |
1783 | * memory, we don't want the Linux-specific update to | |
1784 | * the timeval to cause a fault after the select has | |
1785 | * completed successfully. However, because we're not | |
1786 | * updating the timeval, we can't restart the system | |
1787 | * call. | |
1788 | */ | |
1789 | if (ret == -ERESTARTNOHAND) | |
1790 | ret = -EINTR; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | #ifdef TIF_RESTORE_SIGMASK | |
1798 | asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, | |
1799 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1800 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1801 | compat_size_t sigsetsize) | |
1802 | { | |
1803 | compat_sigset_t ss32; | |
1804 | sigset_t ksigmask, sigsaved; | |
cb82a6cd | 1805 | s64 timeout = MAX_SCHEDULE_TIMEOUT; |
9f72949f DW |
1806 | struct compat_timespec ts; |
1807 | int ret; | |
1808 | ||
1809 | if (tsp) { | |
1810 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1811 | return -EFAULT; | |
1812 | ||
1813 | if (ts.tv_sec < 0 || ts.tv_nsec < 0) | |
1814 | return -EINVAL; | |
1815 | } | |
1816 | ||
1817 | if (sigmask) { | |
1818 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1819 | return -EINVAL; | |
1820 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1821 | return -EFAULT; | |
1822 | sigset_from_compat(&ksigmask, &ss32); | |
1823 | ||
1824 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1825 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1826 | } | |
1827 | ||
1828 | do { | |
1829 | if (tsp) { | |
1830 | if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { | |
1831 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); | |
1832 | timeout += ts.tv_sec * (unsigned long)HZ; | |
1833 | ts.tv_sec = 0; | |
1834 | ts.tv_nsec = 0; | |
1835 | } else { | |
1836 | ts.tv_sec -= MAX_SELECT_SECONDS; | |
1837 | timeout = MAX_SELECT_SECONDS * HZ; | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1842 | ||
1843 | } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec)); | |
1844 | ||
87c2b7c0 | 1845 | if (tsp) { |
643a6545 AM |
1846 | struct compat_timespec rts; |
1847 | ||
87c2b7c0 HC |
1848 | if (current->personality & STICKY_TIMEOUTS) |
1849 | goto sticky; | |
1850 | ||
643a6545 AM |
1851 | rts.tv_sec = timeout / HZ; |
1852 | rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ); | |
1853 | if (rts.tv_nsec >= NSEC_PER_SEC) { | |
1854 | rts.tv_sec++; | |
1855 | rts.tv_nsec -= NSEC_PER_SEC; | |
9f72949f | 1856 | } |
74910e6c | 1857 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 | 1858 | rts = ts; |
87c2b7c0 HC |
1859 | if (copy_to_user(tsp, &rts, sizeof(rts))) { |
1860 | sticky: | |
1861 | /* | |
1862 | * If an application puts its timeval in read-only | |
1863 | * memory, we don't want the Linux-specific update to | |
1864 | * the timeval to cause a fault after the select has | |
1865 | * completed successfully. However, because we're not | |
1866 | * updating the timeval, we can't restart the system | |
1867 | * call. | |
1868 | */ | |
1869 | if (ret == -ERESTARTNOHAND) | |
1870 | ret = -EINTR; | |
1871 | } | |
9f72949f DW |
1872 | } |
1873 | ||
1874 | if (ret == -ERESTARTNOHAND) { | |
1875 | /* | |
1876 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1877 | * the signal on the way back to userspace, before the signal | |
1878 | * mask is restored. | |
1879 | */ | |
1880 | if (sigmask) { | |
1881 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1882 | sizeof(sigsaved)); | |
1883 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1884 | } | |
1885 | } else if (sigmask) | |
1886 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1887 | ||
1888 | return ret; | |
1889 | } | |
1890 | ||
1891 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1892 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1893 | struct compat_timespec __user *tsp, void __user *sig) | |
1894 | { | |
1895 | compat_size_t sigsetsize = 0; | |
1896 | compat_uptr_t up = 0; | |
1897 | ||
1898 | if (sig) { | |
1899 | if (!access_ok(VERIFY_READ, sig, | |
1900 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1901 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1902 | __get_user(sigsetsize, | |
1903 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1904 | return -EFAULT; | |
1905 | } | |
1906 | return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up), | |
1907 | sigsetsize); | |
1908 | } | |
1909 | ||
1910 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1911 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1912 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1913 | { | |
1914 | compat_sigset_t ss32; | |
1915 | sigset_t ksigmask, sigsaved; | |
1916 | struct compat_timespec ts; | |
1917 | s64 timeout = -1; | |
1918 | int ret; | |
1919 | ||
1920 | if (tsp) { | |
1921 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1922 | return -EFAULT; | |
1923 | ||
1924 | /* We assume that ts.tv_sec is always lower than | |
1925 | the number of seconds that can be expressed in | |
1926 | an s64. Otherwise the compiler bitches at us */ | |
7e732bfc | 1927 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1928 | timeout += ts.tv_sec * HZ; |
1929 | } | |
1930 | ||
1931 | if (sigmask) { | |
3835a9bd | 1932 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1933 | return -EINVAL; |
1934 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1935 | return -EFAULT; | |
1936 | sigset_from_compat(&ksigmask, &ss32); | |
1937 | ||
1938 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1939 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1940 | } | |
1941 | ||
1942 | ret = do_sys_poll(ufds, nfds, &timeout); | |
1943 | ||
1944 | /* We can restart this syscall, usually */ | |
1945 | if (ret == -EINTR) { | |
1946 | /* | |
1947 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1948 | * the signal on the way back to userspace, before the signal | |
1949 | * mask is restored. | |
1950 | */ | |
1951 | if (sigmask) { | |
1952 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1953 | sizeof(sigsaved)); | |
1954 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1955 | } | |
1956 | ret = -ERESTARTNOHAND; | |
1957 | } else if (sigmask) | |
1958 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1959 | ||
1960 | if (tsp && timeout >= 0) { | |
643a6545 AM |
1961 | struct compat_timespec rts; |
1962 | ||
9f72949f DW |
1963 | if (current->personality & STICKY_TIMEOUTS) |
1964 | goto sticky; | |
1965 | /* Yes, we know it's actually an s64, but it's also positive. */ | |
643a6545 AM |
1966 | rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) * |
1967 | 1000; | |
1968 | rts.tv_sec = timeout; | |
74910e6c | 1969 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1970 | rts = ts; |
1971 | if (copy_to_user(tsp, &rts, sizeof(rts))) { | |
9f72949f DW |
1972 | sticky: |
1973 | /* | |
1974 | * If an application puts its timeval in read-only | |
1975 | * memory, we don't want the Linux-specific update to | |
1976 | * the timeval to cause a fault after the select has | |
1977 | * completed successfully. However, because we're not | |
1978 | * updating the timeval, we can't restart the system | |
1979 | * call. | |
1980 | */ | |
1981 | if (ret == -ERESTARTNOHAND && timeout >= 0) | |
1982 | ret = -EINTR; | |
1983 | } | |
1984 | } | |
1985 | ||
1986 | return ret; | |
1987 | } | |
1988 | #endif /* TIF_RESTORE_SIGMASK */ | |
1989 | ||
1da177e4 LT |
1990 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1991 | /* Stuff for NFS server syscalls... */ | |
1992 | struct compat_nfsctl_svc { | |
1993 | u16 svc32_port; | |
1994 | s32 svc32_nthreads; | |
1995 | }; | |
1996 | ||
1997 | struct compat_nfsctl_client { | |
1998 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1999 | s32 cl32_naddr; | |
2000 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
2001 | s32 cl32_fhkeytype; | |
2002 | s32 cl32_fhkeylen; | |
2003 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
2004 | }; | |
2005 | ||
2006 | struct compat_nfsctl_export { | |
2007 | char ex32_client[NFSCLNT_IDMAX+1]; | |
2008 | char ex32_path[NFS_MAXPATHLEN+1]; | |
2009 | compat_dev_t ex32_dev; | |
2010 | compat_ino_t ex32_ino; | |
2011 | compat_int_t ex32_flags; | |
202e5979 SR |
2012 | __compat_uid_t ex32_anon_uid; |
2013 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
2014 | }; |
2015 | ||
2016 | struct compat_nfsctl_fdparm { | |
2017 | struct sockaddr gd32_addr; | |
2018 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2019 | compat_int_t gd32_version; | |
2020 | }; | |
2021 | ||
2022 | struct compat_nfsctl_fsparm { | |
2023 | struct sockaddr gd32_addr; | |
2024 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2025 | compat_int_t gd32_maxlen; | |
2026 | }; | |
2027 | ||
2028 | struct compat_nfsctl_arg { | |
2029 | compat_int_t ca32_version; /* safeguard */ | |
2030 | union { | |
2031 | struct compat_nfsctl_svc u32_svc; | |
2032 | struct compat_nfsctl_client u32_client; | |
2033 | struct compat_nfsctl_export u32_export; | |
2034 | struct compat_nfsctl_fdparm u32_getfd; | |
2035 | struct compat_nfsctl_fsparm u32_getfs; | |
2036 | } u; | |
2037 | #define ca32_svc u.u32_svc | |
2038 | #define ca32_client u.u32_client | |
2039 | #define ca32_export u.u32_export | |
2040 | #define ca32_getfd u.u32_getfd | |
2041 | #define ca32_getfs u.u32_getfs | |
2042 | }; | |
2043 | ||
2044 | union compat_nfsctl_res { | |
2045 | __u8 cr32_getfh[NFS_FHSIZE]; | |
2046 | struct knfsd_fh cr32_getfs; | |
2047 | }; | |
2048 | ||
d64b1c87 LFS |
2049 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
2050 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2051 | { |
d64b1c87 LFS |
2052 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2053 | get_user(karg->ca_version, &arg->ca32_version) || | |
2054 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2055 | __get_user(karg->ca_svc.svc_nthreads, | |
2056 | &arg->ca32_svc.svc32_nthreads)) | |
2057 | return -EFAULT; | |
2058 | return 0; | |
1da177e4 LT |
2059 | } |
2060 | ||
d64b1c87 LFS |
2061 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2062 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2063 | { |
d64b1c87 LFS |
2064 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2065 | sizeof(arg->ca32_client)) || | |
2066 | get_user(karg->ca_version, &arg->ca32_version) || | |
2067 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2068 | &arg->ca32_client.cl32_ident[0], | |
2069 | NFSCLNT_IDMAX) || | |
2070 | __get_user(karg->ca_client.cl_naddr, | |
2071 | &arg->ca32_client.cl32_naddr) || | |
2072 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2073 | &arg->ca32_client.cl32_addrlist[0], | |
2074 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2075 | __get_user(karg->ca_client.cl_fhkeytype, | |
2076 | &arg->ca32_client.cl32_fhkeytype) || | |
2077 | __get_user(karg->ca_client.cl_fhkeylen, | |
2078 | &arg->ca32_client.cl32_fhkeylen) || | |
2079 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2080 | &arg->ca32_client.cl32_fhkey[0], | |
2081 | NFSCLNT_KEYMAX)) | |
2082 | return -EFAULT; | |
1da177e4 | 2083 | |
d64b1c87 | 2084 | return 0; |
1da177e4 LT |
2085 | } |
2086 | ||
d64b1c87 LFS |
2087 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2088 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2089 | { |
d64b1c87 LFS |
2090 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2091 | sizeof(arg->ca32_export)) || | |
2092 | get_user(karg->ca_version, &arg->ca32_version) || | |
2093 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2094 | &arg->ca32_export.ex32_client[0], | |
2095 | NFSCLNT_IDMAX) || | |
2096 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2097 | &arg->ca32_export.ex32_path[0], | |
2098 | NFS_MAXPATHLEN) || | |
2099 | __get_user(karg->ca_export.ex_dev, | |
2100 | &arg->ca32_export.ex32_dev) || | |
2101 | __get_user(karg->ca_export.ex_ino, | |
2102 | &arg->ca32_export.ex32_ino) || | |
2103 | __get_user(karg->ca_export.ex_flags, | |
2104 | &arg->ca32_export.ex32_flags) || | |
2105 | __get_user(karg->ca_export.ex_anon_uid, | |
2106 | &arg->ca32_export.ex32_anon_uid) || | |
2107 | __get_user(karg->ca_export.ex_anon_gid, | |
2108 | &arg->ca32_export.ex32_anon_gid)) | |
2109 | return -EFAULT; | |
1da177e4 LT |
2110 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2111 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2112 | ||
d64b1c87 | 2113 | return 0; |
1da177e4 LT |
2114 | } |
2115 | ||
d64b1c87 LFS |
2116 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2117 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2118 | { |
d64b1c87 LFS |
2119 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2120 | sizeof(arg->ca32_getfd)) || | |
2121 | get_user(karg->ca_version, &arg->ca32_version) || | |
2122 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2123 | &arg->ca32_getfd.gd32_addr, | |
2124 | (sizeof(struct sockaddr))) || | |
2125 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2126 | &arg->ca32_getfd.gd32_path, | |
2127 | (NFS_MAXPATHLEN+1)) || | |
2128 | __get_user(karg->ca_getfd.gd_version, | |
2129 | &arg->ca32_getfd.gd32_version)) | |
2130 | return -EFAULT; | |
1da177e4 | 2131 | |
d64b1c87 | 2132 | return 0; |
1da177e4 LT |
2133 | } |
2134 | ||
d64b1c87 LFS |
2135 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2136 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2137 | { |
d64b1c87 LFS |
2138 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2139 | get_user(karg->ca_version, &arg->ca32_version) || | |
2140 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2141 | &arg->ca32_getfs.gd32_addr, | |
2142 | (sizeof(struct sockaddr))) || | |
2143 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2144 | &arg->ca32_getfs.gd32_path, | |
2145 | (NFS_MAXPATHLEN+1)) || | |
2146 | __get_user(karg->ca_getfs.gd_maxlen, | |
2147 | &arg->ca32_getfs.gd32_maxlen)) | |
2148 | return -EFAULT; | |
1da177e4 | 2149 | |
d64b1c87 | 2150 | return 0; |
1da177e4 LT |
2151 | } |
2152 | ||
2153 | /* This really doesn't need translations, we are only passing | |
2154 | * back a union which contains opaque nfs file handle data. | |
2155 | */ | |
d64b1c87 LFS |
2156 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2157 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2158 | { |
2159 | int err; | |
2160 | ||
2161 | err = copy_to_user(res, kres, sizeof(*res)); | |
2162 | ||
2163 | return (err) ? -EFAULT : 0; | |
2164 | } | |
2165 | ||
d64b1c87 LFS |
2166 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2167 | struct compat_nfsctl_arg __user *arg, | |
2168 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2169 | { |
2170 | struct nfsctl_arg *karg; | |
2171 | union nfsctl_res *kres; | |
2172 | mm_segment_t oldfs; | |
2173 | int err; | |
2174 | ||
2175 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2176 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2177 | if(!karg || !kres) { | |
2178 | err = -ENOMEM; | |
2179 | goto done; | |
2180 | } | |
2181 | ||
2182 | switch(cmd) { | |
2183 | case NFSCTL_SVC: | |
2184 | err = compat_nfs_svc_trans(karg, arg); | |
2185 | break; | |
2186 | ||
2187 | case NFSCTL_ADDCLIENT: | |
2188 | err = compat_nfs_clnt_trans(karg, arg); | |
2189 | break; | |
2190 | ||
2191 | case NFSCTL_DELCLIENT: | |
2192 | err = compat_nfs_clnt_trans(karg, arg); | |
2193 | break; | |
2194 | ||
2195 | case NFSCTL_EXPORT: | |
2196 | case NFSCTL_UNEXPORT: | |
2197 | err = compat_nfs_exp_trans(karg, arg); | |
2198 | break; | |
2199 | ||
2200 | case NFSCTL_GETFD: | |
2201 | err = compat_nfs_getfd_trans(karg, arg); | |
2202 | break; | |
2203 | ||
2204 | case NFSCTL_GETFS: | |
2205 | err = compat_nfs_getfs_trans(karg, arg); | |
2206 | break; | |
2207 | ||
2208 | default: | |
2209 | err = -EINVAL; | |
57070d01 | 2210 | break; |
1da177e4 LT |
2211 | } |
2212 | ||
57070d01 PS |
2213 | if (err) |
2214 | goto done; | |
2215 | ||
1da177e4 LT |
2216 | oldfs = get_fs(); |
2217 | set_fs(KERNEL_DS); | |
2218 | /* The __user pointer casts are valid because of the set_fs() */ | |
2219 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2220 | set_fs(oldfs); | |
2221 | ||
2222 | if (err) | |
2223 | goto done; | |
2224 | ||
2225 | if((cmd == NFSCTL_GETFD) || | |
2226 | (cmd == NFSCTL_GETFS)) | |
2227 | err = compat_nfs_getfh_res_trans(kres, res); | |
2228 | ||
2229 | done: | |
2230 | kfree(karg); | |
2231 | kfree(kres); | |
2232 | return err; | |
2233 | } | |
2234 | #else /* !NFSD */ | |
2235 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2236 | { | |
2237 | return sys_ni_syscall(); | |
2238 | } | |
2239 | #endif | |
f6dfb4fd DL |
2240 | |
2241 | #ifdef CONFIG_EPOLL | |
2242 | ||
2243 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2244 | asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd, | |
2245 | struct compat_epoll_event __user *event) | |
2246 | { | |
2247 | long err = 0; | |
2248 | struct compat_epoll_event user; | |
2249 | struct epoll_event __user *kernel = NULL; | |
2250 | ||
2251 | if (event) { | |
2252 | if (copy_from_user(&user, event, sizeof(user))) | |
2253 | return -EFAULT; | |
2254 | kernel = compat_alloc_user_space(sizeof(struct epoll_event)); | |
2255 | err |= __put_user(user.events, &kernel->events); | |
2256 | err |= __put_user(user.data, &kernel->data); | |
2257 | } | |
2258 | ||
2259 | return err ? err : sys_epoll_ctl(epfd, op, fd, kernel); | |
2260 | } | |
2261 | ||
2262 | ||
2263 | asmlinkage long compat_sys_epoll_wait(int epfd, | |
2264 | struct compat_epoll_event __user *events, | |
2265 | int maxevents, int timeout) | |
2266 | { | |
2267 | long i, ret, err = 0; | |
2268 | struct epoll_event __user *kbuf; | |
2269 | struct epoll_event ev; | |
2270 | ||
2271 | if ((maxevents <= 0) || | |
2272 | (maxevents > (INT_MAX / sizeof(struct epoll_event)))) | |
2273 | return -EINVAL; | |
2274 | kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents); | |
2275 | ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout); | |
2276 | for (i = 0; i < ret; i++) { | |
2277 | err |= __get_user(ev.events, &kbuf[i].events); | |
2278 | err |= __get_user(ev.data, &kbuf[i].data); | |
2279 | err |= __put_user(ev.events, &events->events); | |
2280 | err |= __put_user_unaligned(ev.data, &events->data); | |
2281 | events++; | |
2282 | } | |
2283 | ||
2284 | return err ? -EFAULT: ret; | |
2285 | } | |
2286 | #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */ | |
2287 | ||
2288 | #ifdef TIF_RESTORE_SIGMASK | |
2289 | asmlinkage long compat_sys_epoll_pwait(int epfd, | |
2290 | struct compat_epoll_event __user *events, | |
2291 | int maxevents, int timeout, | |
2292 | const compat_sigset_t __user *sigmask, | |
2293 | compat_size_t sigsetsize) | |
2294 | { | |
2295 | long err; | |
2296 | compat_sigset_t csigmask; | |
2297 | sigset_t ksigmask, sigsaved; | |
2298 | ||
2299 | /* | |
2300 | * If the caller wants a certain signal mask to be set during the wait, | |
2301 | * we apply it here. | |
2302 | */ | |
2303 | if (sigmask) { | |
2304 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2305 | return -EINVAL; | |
2306 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2307 | return -EFAULT; | |
2308 | sigset_from_compat(&ksigmask, &csigmask); | |
2309 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2310 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2311 | } | |
2312 | ||
2313 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2314 | err = compat_sys_epoll_wait(epfd, events, maxevents, timeout); | |
2315 | #else | |
2316 | err = sys_epoll_wait(epfd, events, maxevents, timeout); | |
2317 | #endif | |
2318 | ||
2319 | /* | |
2320 | * If we changed the signal mask, we need to restore the original one. | |
2321 | * In case we've got a signal while waiting, we do not restore the | |
2322 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2323 | * the way back to userspace, before the signal mask is restored. | |
2324 | */ | |
2325 | if (sigmask) { | |
2326 | if (err == -EINTR) { | |
2327 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2328 | sizeof(sigsaved)); | |
2329 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
2330 | } else | |
2331 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2332 | } | |
2333 | ||
2334 | return err; | |
2335 | } | |
2336 | #endif /* TIF_RESTORE_SIGMASK */ | |
2337 | ||
2338 | #endif /* CONFIG_EPOLL */ |