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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 | ||
374 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); | |
375 | if (!isprint(buf[1])) | |
376 | sprintf(buf, "%02x", buf[1]); | |
bebfa101 | 377 | compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
1da177e4 LT |
378 | "cmd(%08x){%s} arg(%08x) on %s\n", |
379 | current->comm, current->pid, | |
380 | (int)fd, (unsigned int)cmd, buf, | |
381 | (unsigned int)arg, fn); | |
382 | ||
383 | if (path) | |
384 | free_page((unsigned long)path); | |
385 | } | |
386 | ||
387 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
388 | unsigned long arg) | |
389 | { | |
390 | struct file *filp; | |
391 | int error = -EBADF; | |
392 | struct ioctl_trans *t; | |
393 | int fput_needed; | |
394 | ||
395 | filp = fget_light(fd, &fput_needed); | |
396 | if (!filp) | |
397 | goto out; | |
398 | ||
399 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
400 | error = security_file_ioctl(filp, cmd, arg); | |
401 | if (error) | |
402 | goto out_fput; | |
403 | ||
404 | /* | |
405 | * To allow the compat_ioctl handlers to be self contained | |
406 | * we need to check the common ioctls here first. | |
407 | * Just handle them with the standard handlers below. | |
408 | */ | |
409 | switch (cmd) { | |
410 | case FIOCLEX: | |
411 | case FIONCLEX: | |
412 | case FIONBIO: | |
413 | case FIOASYNC: | |
414 | case FIOQSIZE: | |
415 | break; | |
416 | ||
417 | case FIBMAP: | |
418 | case FIGETBSZ: | |
419 | case FIONREAD: | |
0f7fc9e4 | 420 | if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) |
1da177e4 LT |
421 | break; |
422 | /*FALL THROUGH*/ | |
423 | ||
424 | default: | |
425 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
426 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
427 | if (error != -ENOIOCTLCMD) | |
428 | goto out_fput; | |
429 | } | |
430 | ||
431 | if (!filp->f_op || | |
432 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
433 | goto do_ioctl; | |
434 | break; | |
435 | } | |
436 | ||
1da177e4 LT |
437 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
438 | if (t->cmd == cmd) | |
439 | goto found_handler; | |
440 | } | |
1da177e4 | 441 | |
0f7fc9e4 | 442 | if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) && |
1da177e4 LT |
443 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
444 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
445 | } else { | |
446 | static int count; | |
447 | ||
448 | if (++count <= 50) | |
449 | compat_ioctl_error(filp, fd, cmd, arg); | |
450 | error = -EINVAL; | |
451 | } | |
452 | ||
453 | goto out_fput; | |
454 | ||
455 | found_handler: | |
456 | if (t->handler) { | |
457 | lock_kernel(); | |
458 | error = t->handler(fd, cmd, arg, filp); | |
459 | unlock_kernel(); | |
1da177e4 LT |
460 | goto out_fput; |
461 | } | |
462 | ||
1da177e4 LT |
463 | do_ioctl: |
464 | error = vfs_ioctl(filp, fd, cmd, arg); | |
465 | out_fput: | |
466 | fput_light(filp, fput_needed); | |
467 | out: | |
468 | return error; | |
469 | } | |
470 | ||
471 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
472 | { | |
473 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
474 | __get_user(kfl->l_type, &ufl->l_type) || | |
475 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
476 | __get_user(kfl->l_start, &ufl->l_start) || | |
477 | __get_user(kfl->l_len, &ufl->l_len) || | |
478 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
479 | return -EFAULT; | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
484 | { | |
485 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
486 | __put_user(kfl->l_type, &ufl->l_type) || | |
487 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
488 | __put_user(kfl->l_start, &ufl->l_start) || | |
489 | __put_user(kfl->l_len, &ufl->l_len) || | |
490 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
491 | return -EFAULT; | |
492 | return 0; | |
493 | } | |
494 | ||
495 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
496 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
497 | { | |
498 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
499 | __get_user(kfl->l_type, &ufl->l_type) || | |
500 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
501 | __get_user(kfl->l_start, &ufl->l_start) || | |
502 | __get_user(kfl->l_len, &ufl->l_len) || | |
503 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
504 | return -EFAULT; | |
505 | return 0; | |
506 | } | |
507 | #endif | |
508 | ||
509 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
510 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
511 | { | |
512 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
513 | __put_user(kfl->l_type, &ufl->l_type) || | |
514 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
515 | __put_user(kfl->l_start, &ufl->l_start) || | |
516 | __put_user(kfl->l_len, &ufl->l_len) || | |
517 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
518 | return -EFAULT; | |
519 | return 0; | |
520 | } | |
521 | #endif | |
522 | ||
523 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
524 | unsigned long arg) | |
525 | { | |
526 | mm_segment_t old_fs; | |
527 | struct flock f; | |
528 | long ret; | |
529 | ||
530 | switch (cmd) { | |
531 | case F_GETLK: | |
532 | case F_SETLK: | |
533 | case F_SETLKW: | |
534 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
535 | if (ret != 0) | |
536 | break; | |
537 | old_fs = get_fs(); | |
538 | set_fs(KERNEL_DS); | |
539 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
540 | set_fs(old_fs); | |
541 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
542 | /* GETLK was successfule and we need to return the data... |
543 | * but it needs to fit in the compat structure. | |
544 | * l_start shouldn't be too big, unless the original | |
545 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
546 | * case the app was asking for trouble, so we return | |
547 | * -EOVERFLOW in that case. | |
548 | * l_len could be too big, in which case we just truncate it, | |
549 | * and only allow the app to see that part of the conflicting | |
550 | * lock that might make sense to it anyway | |
551 | */ | |
552 | ||
553 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 554 | ret = -EOVERFLOW; |
2520f14c N |
555 | if (f.l_len > COMPAT_OFF_T_MAX) |
556 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
557 | if (ret == 0) |
558 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
559 | } | |
560 | break; | |
561 | ||
562 | case F_GETLK64: | |
563 | case F_SETLK64: | |
564 | case F_SETLKW64: | |
565 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
566 | if (ret != 0) | |
567 | break; | |
568 | old_fs = get_fs(); | |
569 | set_fs(KERNEL_DS); | |
570 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
571 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
572 | (unsigned long)&f); | |
573 | set_fs(old_fs); | |
574 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
575 | /* need to return lock information - see above for commentary */ |
576 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 577 | ret = -EOVERFLOW; |
2520f14c N |
578 | if (f.l_len > COMPAT_LOFF_T_MAX) |
579 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
580 | if (ret == 0) |
581 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
582 | } | |
583 | break; | |
584 | ||
585 | default: | |
586 | ret = sys_fcntl(fd, cmd, arg); | |
587 | break; | |
588 | } | |
589 | return ret; | |
590 | } | |
591 | ||
592 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
593 | unsigned long arg) | |
594 | { | |
595 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
596 | return -EINVAL; | |
597 | return compat_sys_fcntl64(fd, cmd, arg); | |
598 | } | |
599 | ||
600 | asmlinkage long | |
601 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
602 | { | |
603 | long ret; | |
604 | aio_context_t ctx64; | |
605 | ||
606 | mm_segment_t oldfs = get_fs(); | |
607 | if (unlikely(get_user(ctx64, ctx32p))) | |
608 | return -EFAULT; | |
609 | ||
610 | set_fs(KERNEL_DS); | |
611 | /* The __user pointer cast is valid because of the set_fs() */ | |
612 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
613 | set_fs(oldfs); | |
614 | /* truncating is ok because it's a user address */ | |
615 | if (!ret) | |
616 | ret = put_user((u32) ctx64, ctx32p); | |
617 | return ret; | |
618 | } | |
619 | ||
620 | asmlinkage long | |
621 | compat_sys_io_getevents(aio_context_t ctx_id, | |
622 | unsigned long min_nr, | |
623 | unsigned long nr, | |
624 | struct io_event __user *events, | |
625 | struct compat_timespec __user *timeout) | |
626 | { | |
627 | long ret; | |
628 | struct timespec t; | |
629 | struct timespec __user *ut = NULL; | |
630 | ||
631 | ret = -EFAULT; | |
632 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
633 | nr * sizeof(struct io_event)))) | |
634 | goto out; | |
635 | if (timeout) { | |
636 | if (get_compat_timespec(&t, timeout)) | |
637 | goto out; | |
638 | ||
639 | ut = compat_alloc_user_space(sizeof(*ut)); | |
640 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
641 | goto out; | |
642 | } | |
643 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
644 | out: | |
645 | return ret; | |
646 | } | |
647 | ||
648 | static inline long | |
649 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
650 | { | |
651 | compat_uptr_t uptr; | |
652 | int i; | |
653 | ||
654 | for (i = 0; i < nr; ++i) { | |
655 | if (get_user(uptr, ptr32 + i)) | |
656 | return -EFAULT; | |
657 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
658 | return -EFAULT; | |
659 | } | |
660 | return 0; | |
661 | } | |
662 | ||
663 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
664 | ||
665 | asmlinkage long | |
666 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
667 | { | |
668 | struct iocb __user * __user *iocb64; | |
669 | long ret; | |
670 | ||
671 | if (unlikely(nr < 0)) | |
672 | return -EINVAL; | |
673 | ||
674 | if (nr > MAX_AIO_SUBMITS) | |
675 | nr = MAX_AIO_SUBMITS; | |
676 | ||
677 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
678 | ret = copy_iocb(nr, iocb, iocb64); | |
679 | if (!ret) | |
680 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
681 | return ret; | |
682 | } | |
683 | ||
684 | struct compat_ncp_mount_data { | |
685 | compat_int_t version; | |
686 | compat_uint_t ncp_fd; | |
202e5979 | 687 | __compat_uid_t mounted_uid; |
1da177e4 LT |
688 | compat_pid_t wdog_pid; |
689 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
690 | compat_uint_t time_out; | |
691 | compat_uint_t retry_count; | |
692 | compat_uint_t flags; | |
202e5979 SR |
693 | __compat_uid_t uid; |
694 | __compat_gid_t gid; | |
1da177e4 LT |
695 | compat_mode_t file_mode; |
696 | compat_mode_t dir_mode; | |
697 | }; | |
698 | ||
699 | struct compat_ncp_mount_data_v4 { | |
700 | compat_int_t version; | |
701 | compat_ulong_t flags; | |
702 | compat_ulong_t mounted_uid; | |
703 | compat_long_t wdog_pid; | |
704 | compat_uint_t ncp_fd; | |
705 | compat_uint_t time_out; | |
706 | compat_uint_t retry_count; | |
707 | compat_ulong_t uid; | |
708 | compat_ulong_t gid; | |
709 | compat_ulong_t file_mode; | |
710 | compat_ulong_t dir_mode; | |
711 | }; | |
712 | ||
713 | static void *do_ncp_super_data_conv(void *raw_data) | |
714 | { | |
715 | int version = *(unsigned int *)raw_data; | |
716 | ||
717 | if (version == 3) { | |
718 | struct compat_ncp_mount_data *c_n = raw_data; | |
719 | struct ncp_mount_data *n = raw_data; | |
720 | ||
721 | n->dir_mode = c_n->dir_mode; | |
722 | n->file_mode = c_n->file_mode; | |
723 | n->gid = c_n->gid; | |
724 | n->uid = c_n->uid; | |
725 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
726 | n->wdog_pid = c_n->wdog_pid; | |
727 | n->mounted_uid = c_n->mounted_uid; | |
728 | } else if (version == 4) { | |
729 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
730 | struct ncp_mount_data_v4 *n = raw_data; | |
731 | ||
732 | n->dir_mode = c_n->dir_mode; | |
733 | n->file_mode = c_n->file_mode; | |
734 | n->gid = c_n->gid; | |
735 | n->uid = c_n->uid; | |
736 | n->retry_count = c_n->retry_count; | |
737 | n->time_out = c_n->time_out; | |
738 | n->ncp_fd = c_n->ncp_fd; | |
739 | n->wdog_pid = c_n->wdog_pid; | |
740 | n->mounted_uid = c_n->mounted_uid; | |
741 | n->flags = c_n->flags; | |
742 | } else if (version != 5) { | |
743 | return NULL; | |
744 | } | |
745 | ||
746 | return raw_data; | |
747 | } | |
748 | ||
749 | struct compat_smb_mount_data { | |
750 | compat_int_t version; | |
202e5979 SR |
751 | __compat_uid_t mounted_uid; |
752 | __compat_uid_t uid; | |
753 | __compat_gid_t gid; | |
1da177e4 LT |
754 | compat_mode_t file_mode; |
755 | compat_mode_t dir_mode; | |
756 | }; | |
757 | ||
758 | static void *do_smb_super_data_conv(void *raw_data) | |
759 | { | |
760 | struct smb_mount_data *s = raw_data; | |
761 | struct compat_smb_mount_data *c_s = raw_data; | |
762 | ||
763 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
764 | goto out; | |
765 | s->dir_mode = c_s->dir_mode; | |
766 | s->file_mode = c_s->file_mode; | |
767 | s->gid = c_s->gid; | |
768 | s->uid = c_s->uid; | |
769 | s->mounted_uid = c_s->mounted_uid; | |
770 | out: | |
771 | return raw_data; | |
772 | } | |
773 | ||
9a9947bf DH |
774 | struct compat_nfs_string { |
775 | compat_uint_t len; | |
5fc3e624 | 776 | compat_uptr_t data; |
9a9947bf DH |
777 | }; |
778 | ||
779 | static inline void compat_nfs_string(struct nfs_string *dst, | |
780 | struct compat_nfs_string *src) | |
781 | { | |
782 | dst->data = compat_ptr(src->data); | |
783 | dst->len = src->len; | |
784 | } | |
785 | ||
786 | struct compat_nfs4_mount_data_v1 { | |
787 | compat_int_t version; | |
788 | compat_int_t flags; | |
789 | compat_int_t rsize; | |
790 | compat_int_t wsize; | |
791 | compat_int_t timeo; | |
792 | compat_int_t retrans; | |
793 | compat_int_t acregmin; | |
794 | compat_int_t acregmax; | |
795 | compat_int_t acdirmin; | |
796 | compat_int_t acdirmax; | |
797 | struct compat_nfs_string client_addr; | |
798 | struct compat_nfs_string mnt_path; | |
799 | struct compat_nfs_string hostname; | |
800 | compat_uint_t host_addrlen; | |
5fc3e624 | 801 | compat_uptr_t host_addr; |
9a9947bf DH |
802 | compat_int_t proto; |
803 | compat_int_t auth_flavourlen; | |
5fc3e624 | 804 | compat_uptr_t auth_flavours; |
9a9947bf DH |
805 | }; |
806 | ||
807 | static int do_nfs4_super_data_conv(void *raw_data) | |
808 | { | |
809 | int version = *(compat_uint_t *) raw_data; | |
810 | ||
811 | if (version == 1) { | |
812 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
813 | struct nfs4_mount_data *real = raw_data; | |
814 | ||
815 | /* copy the fields backwards */ | |
816 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
817 | real->auth_flavourlen = raw->auth_flavourlen; | |
818 | real->proto = raw->proto; | |
819 | real->host_addr = compat_ptr(raw->host_addr); | |
820 | real->host_addrlen = raw->host_addrlen; | |
821 | compat_nfs_string(&real->hostname, &raw->hostname); | |
822 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
823 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
824 | real->acdirmax = raw->acdirmax; | |
825 | real->acdirmin = raw->acdirmin; | |
826 | real->acregmax = raw->acregmax; | |
827 | real->acregmin = raw->acregmin; | |
828 | real->retrans = raw->retrans; | |
829 | real->timeo = raw->timeo; | |
830 | real->wsize = raw->wsize; | |
831 | real->rsize = raw->rsize; | |
832 | real->flags = raw->flags; | |
833 | real->version = raw->version; | |
834 | } | |
835 | else { | |
836 | return -EINVAL; | |
837 | } | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
1da177e4 LT |
842 | #define SMBFS_NAME "smbfs" |
843 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 844 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
845 | |
846 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
847 | char __user * type, unsigned long flags, | |
848 | void __user * data) | |
849 | { | |
850 | unsigned long type_page; | |
851 | unsigned long data_page; | |
852 | unsigned long dev_page; | |
853 | char *dir_page; | |
854 | int retval; | |
855 | ||
856 | retval = copy_mount_options (type, &type_page); | |
857 | if (retval < 0) | |
858 | goto out; | |
859 | ||
860 | dir_page = getname(dir_name); | |
861 | retval = PTR_ERR(dir_page); | |
862 | if (IS_ERR(dir_page)) | |
863 | goto out1; | |
864 | ||
865 | retval = copy_mount_options (dev_name, &dev_page); | |
866 | if (retval < 0) | |
867 | goto out2; | |
868 | ||
869 | retval = copy_mount_options (data, &data_page); | |
870 | if (retval < 0) | |
871 | goto out3; | |
872 | ||
873 | retval = -EINVAL; | |
874 | ||
822191a2 | 875 | if (type_page && data_page) { |
1da177e4 LT |
876 | if (!strcmp((char *)type_page, SMBFS_NAME)) { |
877 | do_smb_super_data_conv((void *)data_page); | |
878 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
879 | do_ncp_super_data_conv((void *)data_page); | |
9a9947bf DH |
880 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
881 | if (do_nfs4_super_data_conv((void *) data_page)) | |
882 | goto out4; | |
1da177e4 LT |
883 | } |
884 | } | |
885 | ||
886 | lock_kernel(); | |
887 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
888 | flags, (void*)data_page); | |
889 | unlock_kernel(); | |
890 | ||
9a9947bf | 891 | out4: |
1da177e4 LT |
892 | free_page(data_page); |
893 | out3: | |
894 | free_page(dev_page); | |
895 | out2: | |
896 | putname(dir_page); | |
897 | out1: | |
898 | free_page(type_page); | |
899 | out: | |
900 | return retval; | |
901 | } | |
902 | ||
903 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
904 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ | |
905 | ~(sizeof(compat_long_t)-1)) | |
906 | ||
907 | struct compat_old_linux_dirent { | |
908 | compat_ulong_t d_ino; | |
909 | compat_ulong_t d_offset; | |
910 | unsigned short d_namlen; | |
911 | char d_name[1]; | |
912 | }; | |
913 | ||
914 | struct compat_readdir_callback { | |
915 | struct compat_old_linux_dirent __user *dirent; | |
916 | int result; | |
917 | }; | |
918 | ||
919 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 920 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
921 | { |
922 | struct compat_readdir_callback *buf = __buf; | |
923 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 924 | compat_ulong_t d_ino; |
1da177e4 LT |
925 | |
926 | if (buf->result) | |
927 | return -EINVAL; | |
afefdbb2 DH |
928 | d_ino = ino; |
929 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
930 | return -EOVERFLOW; | |
1da177e4 LT |
931 | buf->result++; |
932 | dirent = buf->dirent; | |
933 | if (!access_ok(VERIFY_WRITE, dirent, | |
934 | (unsigned long)(dirent->d_name + namlen + 1) - | |
935 | (unsigned long)dirent)) | |
936 | goto efault; | |
afefdbb2 | 937 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
938 | __put_user(offset, &dirent->d_offset) || |
939 | __put_user(namlen, &dirent->d_namlen) || | |
940 | __copy_to_user(dirent->d_name, name, namlen) || | |
941 | __put_user(0, dirent->d_name + namlen)) | |
942 | goto efault; | |
943 | return 0; | |
944 | efault: | |
945 | buf->result = -EFAULT; | |
946 | return -EFAULT; | |
947 | } | |
948 | ||
949 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
950 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
951 | { | |
952 | int error; | |
953 | struct file *file; | |
954 | struct compat_readdir_callback buf; | |
955 | ||
956 | error = -EBADF; | |
957 | file = fget(fd); | |
958 | if (!file) | |
959 | goto out; | |
960 | ||
961 | buf.result = 0; | |
962 | buf.dirent = dirent; | |
963 | ||
964 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
965 | if (error >= 0) | |
966 | error = buf.result; | |
967 | ||
968 | fput(file); | |
969 | out: | |
970 | return error; | |
971 | } | |
972 | ||
973 | struct compat_linux_dirent { | |
974 | compat_ulong_t d_ino; | |
975 | compat_ulong_t d_off; | |
976 | unsigned short d_reclen; | |
977 | char d_name[1]; | |
978 | }; | |
979 | ||
980 | struct compat_getdents_callback { | |
981 | struct compat_linux_dirent __user *current_dir; | |
982 | struct compat_linux_dirent __user *previous; | |
983 | int count; | |
984 | int error; | |
985 | }; | |
986 | ||
987 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 988 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
989 | { |
990 | struct compat_linux_dirent __user * dirent; | |
991 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 992 | compat_ulong_t d_ino; |
1da177e4 LT |
993 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); |
994 | ||
995 | buf->error = -EINVAL; /* only used if we fail.. */ | |
996 | if (reclen > buf->count) | |
997 | return -EINVAL; | |
afefdbb2 DH |
998 | d_ino = ino; |
999 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
1000 | return -EOVERFLOW; | |
1da177e4 LT |
1001 | dirent = buf->previous; |
1002 | if (dirent) { | |
1003 | if (__put_user(offset, &dirent->d_off)) | |
1004 | goto efault; | |
1005 | } | |
1006 | dirent = buf->current_dir; | |
afefdbb2 | 1007 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
1008 | goto efault; |
1009 | if (__put_user(reclen, &dirent->d_reclen)) | |
1010 | goto efault; | |
1011 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1012 | goto efault; | |
1013 | if (__put_user(0, dirent->d_name + namlen)) | |
1014 | goto efault; | |
1015 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
1016 | goto efault; | |
1017 | buf->previous = dirent; | |
1018 | dirent = (void __user *)dirent + reclen; | |
1019 | buf->current_dir = dirent; | |
1020 | buf->count -= reclen; | |
1021 | return 0; | |
1022 | efault: | |
1023 | buf->error = -EFAULT; | |
1024 | return -EFAULT; | |
1025 | } | |
1026 | ||
1027 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1028 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1029 | { | |
1030 | struct file * file; | |
1031 | struct compat_linux_dirent __user * lastdirent; | |
1032 | struct compat_getdents_callback buf; | |
1033 | int error; | |
1034 | ||
1035 | error = -EFAULT; | |
1036 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1037 | goto out; | |
1038 | ||
1039 | error = -EBADF; | |
1040 | file = fget(fd); | |
1041 | if (!file) | |
1042 | goto out; | |
1043 | ||
1044 | buf.current_dir = dirent; | |
1045 | buf.previous = NULL; | |
1046 | buf.count = count; | |
1047 | buf.error = 0; | |
1048 | ||
1049 | error = vfs_readdir(file, compat_filldir, &buf); | |
1050 | if (error < 0) | |
1051 | goto out_putf; | |
1052 | error = buf.error; | |
1053 | lastdirent = buf.previous; | |
1054 | if (lastdirent) { | |
1055 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1056 | error = -EFAULT; | |
1057 | else | |
1058 | error = count - buf.count; | |
1059 | } | |
1060 | ||
1061 | out_putf: | |
1062 | fput(file); | |
1063 | out: | |
1064 | return error; | |
1065 | } | |
1066 | ||
1067 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1068 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1069 | ||
1070 | struct compat_getdents_callback64 { | |
1071 | struct linux_dirent64 __user *current_dir; | |
1072 | struct linux_dirent64 __user *previous; | |
1073 | int count; | |
1074 | int error; | |
1075 | }; | |
1076 | ||
1077 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1078 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1079 | { |
1080 | struct linux_dirent64 __user *dirent; | |
1081 | struct compat_getdents_callback64 *buf = __buf; | |
1082 | int jj = NAME_OFFSET(dirent); | |
1083 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1084 | u64 off; | |
1085 | ||
1086 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1087 | if (reclen > buf->count) | |
1088 | return -EINVAL; | |
1089 | dirent = buf->previous; | |
1090 | ||
1091 | if (dirent) { | |
1092 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1093 | goto efault; | |
1094 | } | |
1095 | dirent = buf->current_dir; | |
1096 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1097 | goto efault; | |
1098 | off = 0; | |
1099 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1100 | goto efault; | |
1101 | if (__put_user(reclen, &dirent->d_reclen)) | |
1102 | goto efault; | |
1103 | if (__put_user(d_type, &dirent->d_type)) | |
1104 | goto efault; | |
1105 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1106 | goto efault; | |
1107 | if (__put_user(0, dirent->d_name + namlen)) | |
1108 | goto efault; | |
1109 | buf->previous = dirent; | |
1110 | dirent = (void __user *)dirent + reclen; | |
1111 | buf->current_dir = dirent; | |
1112 | buf->count -= reclen; | |
1113 | return 0; | |
1114 | efault: | |
1115 | buf->error = -EFAULT; | |
1116 | return -EFAULT; | |
1117 | } | |
1118 | ||
1119 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1120 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1121 | { | |
1122 | struct file * file; | |
1123 | struct linux_dirent64 __user * lastdirent; | |
1124 | struct compat_getdents_callback64 buf; | |
1125 | int error; | |
1126 | ||
1127 | error = -EFAULT; | |
1128 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1129 | goto out; | |
1130 | ||
1131 | error = -EBADF; | |
1132 | file = fget(fd); | |
1133 | if (!file) | |
1134 | goto out; | |
1135 | ||
1136 | buf.current_dir = dirent; | |
1137 | buf.previous = NULL; | |
1138 | buf.count = count; | |
1139 | buf.error = 0; | |
1140 | ||
1141 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1142 | if (error < 0) | |
1143 | goto out_putf; | |
1144 | error = buf.error; | |
1145 | lastdirent = buf.previous; | |
1146 | if (lastdirent) { | |
1147 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 HC |
1148 | error = -EFAULT; |
1149 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) | |
1150 | goto out_putf; | |
1da177e4 LT |
1151 | error = count - buf.count; |
1152 | } | |
1153 | ||
1154 | out_putf: | |
1155 | fput(file); | |
1156 | out: | |
1157 | return error; | |
1158 | } | |
1159 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1160 | ||
1161 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1162 | const struct compat_iovec __user *uvector, | |
1163 | unsigned long nr_segs, loff_t *pos) | |
1164 | { | |
1da177e4 LT |
1165 | compat_ssize_t tot_len; |
1166 | struct iovec iovstack[UIO_FASTIOV]; | |
1167 | struct iovec *iov=iovstack, *vector; | |
1168 | ssize_t ret; | |
1169 | int seg; | |
1170 | io_fn_t fn; | |
1171 | iov_fn_t fnv; | |
1172 | ||
1173 | /* | |
1174 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1175 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1176 | * traditionally returned zero for zero segments, so... | |
1177 | */ | |
1178 | ret = 0; | |
1179 | if (nr_segs == 0) | |
1180 | goto out; | |
1181 | ||
1182 | /* | |
1183 | * First get the "struct iovec" from user memory and | |
1184 | * verify all the pointers | |
1185 | */ | |
1186 | ret = -EINVAL; | |
1187 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1188 | goto out; | |
1189 | if (!file->f_op) | |
1190 | goto out; | |
1191 | if (nr_segs > UIO_FASTIOV) { | |
1192 | ret = -ENOMEM; | |
1193 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1194 | if (!iov) | |
1195 | goto out; | |
1196 | } | |
1197 | ret = -EFAULT; | |
1198 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1199 | goto out; | |
1200 | ||
1201 | /* | |
1202 | * Single unix specification: | |
1203 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1204 | * ssize_t. The total length is fitting an ssize_t | |
1205 | * | |
1206 | * Be careful here because iov_len is a size_t not an ssize_t | |
1207 | */ | |
1208 | tot_len = 0; | |
1209 | vector = iov; | |
1210 | ret = -EINVAL; | |
1211 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1212 | compat_ssize_t tmp = tot_len; | |
1213 | compat_ssize_t len; | |
1214 | compat_uptr_t buf; | |
1215 | ||
1216 | if (__get_user(len, &uvector->iov_len) || | |
1217 | __get_user(buf, &uvector->iov_base)) { | |
1218 | ret = -EFAULT; | |
1219 | goto out; | |
1220 | } | |
1221 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1222 | goto out; | |
1223 | tot_len += len; | |
1224 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1225 | goto out; | |
1226 | vector->iov_base = compat_ptr(buf); | |
1227 | vector->iov_len = (compat_size_t) len; | |
1228 | uvector++; | |
1229 | vector++; | |
1230 | } | |
1231 | if (tot_len == 0) { | |
1232 | ret = 0; | |
1233 | goto out; | |
1234 | } | |
1235 | ||
1236 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1237 | if (ret < 0) |
1da177e4 LT |
1238 | goto out; |
1239 | ||
e7edf9cd JM |
1240 | ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); |
1241 | if (ret) | |
1242 | goto out; | |
1243 | ||
1da177e4 LT |
1244 | fnv = NULL; |
1245 | if (type == READ) { | |
1246 | fn = file->f_op->read; | |
ee0b3e67 | 1247 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1248 | } else { |
1249 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1250 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1251 | } |
1252 | ||
ee0b3e67 BP |
1253 | if (fnv) |
1254 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1255 | pos, fnv); | |
1256 | else | |
1257 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1258 | |
1da177e4 LT |
1259 | out: |
1260 | if (iov != iovstack) | |
1261 | kfree(iov); | |
0eeca283 | 1262 | if ((ret + (type == READ)) > 0) { |
0f7fc9e4 | 1263 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
1264 | if (type == READ) |
1265 | fsnotify_access(dentry); | |
1266 | else | |
1267 | fsnotify_modify(dentry); | |
1268 | } | |
1da177e4 LT |
1269 | return ret; |
1270 | } | |
1271 | ||
1272 | asmlinkage ssize_t | |
1273 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1274 | { | |
1275 | struct file *file; | |
1276 | ssize_t ret = -EBADF; | |
1277 | ||
1278 | file = fget(fd); | |
1279 | if (!file) | |
1280 | return -EBADF; | |
1281 | ||
1282 | if (!(file->f_mode & FMODE_READ)) | |
1283 | goto out; | |
1284 | ||
1285 | ret = -EINVAL; | |
ee0b3e67 | 1286 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1287 | goto out; |
1288 | ||
1289 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1290 | ||
1291 | out: | |
1292 | fput(file); | |
1293 | return ret; | |
1294 | } | |
1295 | ||
1296 | asmlinkage ssize_t | |
1297 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1298 | { | |
1299 | struct file *file; | |
1300 | ssize_t ret = -EBADF; | |
1301 | ||
1302 | file = fget(fd); | |
1303 | if (!file) | |
1304 | return -EBADF; | |
1305 | if (!(file->f_mode & FMODE_WRITE)) | |
1306 | goto out; | |
1307 | ||
1308 | ret = -EINVAL; | |
ee0b3e67 | 1309 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1310 | goto out; |
1311 | ||
1312 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1313 | ||
1314 | out: | |
1315 | fput(file); | |
1316 | return ret; | |
1317 | } | |
1318 | ||
d2610202 AK |
1319 | asmlinkage long |
1320 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1321 | unsigned int nr_segs, unsigned int flags) | |
1322 | { | |
1323 | unsigned i; | |
90cbad65 | 1324 | struct iovec __user *iov; |
98232d50 | 1325 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1326 | return -EINVAL; |
1327 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1328 | for (i = 0; i < nr_segs; i++) { | |
1329 | struct compat_iovec v; | |
1330 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1331 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1332 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1333 | put_user(v.iov_len, &iov[i].iov_len)) | |
1334 | return -EFAULT; | |
1335 | } | |
1336 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1337 | } | |
1338 | ||
e922efc3 MS |
1339 | /* |
1340 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1341 | * O_LARGEFILE flag. | |
1342 | */ | |
1343 | asmlinkage long | |
1344 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1345 | { | |
5590ff0d UD |
1346 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1351 | * O_LARGEFILE flag. | |
1352 | */ | |
1353 | asmlinkage long | |
9ad11ab4 | 1354 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1355 | { |
1356 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1357 | } |
1358 | ||
1da177e4 LT |
1359 | /* |
1360 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1361 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1362 | * and envp pointers. | |
1363 | */ | |
1364 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1365 | { | |
1366 | int i = 0; | |
1367 | ||
1368 | if (argv != NULL) { | |
1369 | for (;;) { | |
1370 | compat_uptr_t p; | |
1371 | ||
1372 | if (get_user(p, argv)) | |
1373 | return -EFAULT; | |
1374 | if (!p) | |
1375 | break; | |
1376 | argv++; | |
1377 | if(++i > max) | |
1378 | return -E2BIG; | |
1379 | } | |
1380 | } | |
1381 | return i; | |
1382 | } | |
1383 | ||
1384 | /* | |
1385 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1386 | * except that it works with 32 bit argv and envp pointers. | |
1387 | */ | |
1388 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1389 | struct linux_binprm *bprm) | |
1390 | { | |
1391 | struct page *kmapped_page = NULL; | |
1392 | char *kaddr = NULL; | |
1393 | int ret; | |
1394 | ||
1395 | while (argc-- > 0) { | |
1396 | compat_uptr_t str; | |
1397 | int len; | |
1398 | unsigned long pos; | |
1399 | ||
1400 | if (get_user(str, argv+argc) || | |
1401 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1402 | ret = -EFAULT; | |
1403 | goto out; | |
1404 | } | |
1405 | ||
1406 | if (bprm->p < len) { | |
1407 | ret = -E2BIG; | |
1408 | goto out; | |
1409 | } | |
1410 | ||
1411 | bprm->p -= len; | |
1412 | /* XXX: add architecture specific overflow check here. */ | |
1413 | pos = bprm->p; | |
1414 | ||
1415 | while (len > 0) { | |
1416 | int i, new, err; | |
1417 | int offset, bytes_to_copy; | |
1418 | struct page *page; | |
1419 | ||
1420 | offset = pos % PAGE_SIZE; | |
1421 | i = pos/PAGE_SIZE; | |
1422 | page = bprm->page[i]; | |
1423 | new = 0; | |
1424 | if (!page) { | |
1425 | page = alloc_page(GFP_HIGHUSER); | |
1426 | bprm->page[i] = page; | |
1427 | if (!page) { | |
1428 | ret = -ENOMEM; | |
1429 | goto out; | |
1430 | } | |
1431 | new = 1; | |
1432 | } | |
1433 | ||
1434 | if (page != kmapped_page) { | |
1435 | if (kmapped_page) | |
1436 | kunmap(kmapped_page); | |
1437 | kmapped_page = page; | |
1438 | kaddr = kmap(kmapped_page); | |
1439 | } | |
1440 | if (new && offset) | |
1441 | memset(kaddr, 0, offset); | |
1442 | bytes_to_copy = PAGE_SIZE - offset; | |
1443 | if (bytes_to_copy > len) { | |
1444 | bytes_to_copy = len; | |
1445 | if (new) | |
1446 | memset(kaddr+offset+len, 0, | |
1447 | PAGE_SIZE-offset-len); | |
1448 | } | |
1449 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1450 | bytes_to_copy); | |
1451 | if (err) { | |
1452 | ret = -EFAULT; | |
1453 | goto out; | |
1454 | } | |
1455 | ||
1456 | pos += bytes_to_copy; | |
1457 | str += bytes_to_copy; | |
1458 | len -= bytes_to_copy; | |
1459 | } | |
1460 | } | |
1461 | ret = 0; | |
1462 | out: | |
1463 | if (kmapped_page) | |
1464 | kunmap(kmapped_page); | |
1465 | return ret; | |
1466 | } | |
1467 | ||
1468 | #ifdef CONFIG_MMU | |
1469 | ||
1470 | #define free_arg_pages(bprm) do { } while (0) | |
1471 | ||
1472 | #else | |
1473 | ||
1474 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1475 | { | |
1476 | int i; | |
1477 | ||
1478 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1479 | if (bprm->page[i]) | |
1480 | __free_page(bprm->page[i]); | |
1481 | bprm->page[i] = NULL; | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | #endif /* CONFIG_MMU */ | |
1486 | ||
1487 | /* | |
1488 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1489 | * that it processes 32 bit argv and envp pointers. | |
1490 | */ | |
1491 | int compat_do_execve(char * filename, | |
1492 | compat_uptr_t __user *argv, | |
1493 | compat_uptr_t __user *envp, | |
1494 | struct pt_regs * regs) | |
1495 | { | |
1496 | struct linux_binprm *bprm; | |
1497 | struct file *file; | |
1498 | int retval; | |
1499 | int i; | |
1500 | ||
1501 | retval = -ENOMEM; | |
11b0b5ab | 1502 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 LT |
1503 | if (!bprm) |
1504 | goto out_ret; | |
1da177e4 LT |
1505 | |
1506 | file = open_exec(filename); | |
1507 | retval = PTR_ERR(file); | |
1508 | if (IS_ERR(file)) | |
1509 | goto out_kfree; | |
1510 | ||
1511 | sched_exec(); | |
1512 | ||
1513 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1514 | bprm->file = file; | |
1515 | bprm->filename = filename; | |
1516 | bprm->interp = filename; | |
1517 | bprm->mm = mm_alloc(); | |
1518 | retval = -ENOMEM; | |
1519 | if (!bprm->mm) | |
1520 | goto out_file; | |
1521 | ||
1522 | retval = init_new_context(current, bprm->mm); | |
1523 | if (retval < 0) | |
1524 | goto out_mm; | |
1525 | ||
1526 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1527 | if ((retval = bprm->argc) < 0) | |
1528 | goto out_mm; | |
1529 | ||
1530 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1531 | if ((retval = bprm->envc) < 0) | |
1532 | goto out_mm; | |
1533 | ||
1534 | retval = security_bprm_alloc(bprm); | |
1535 | if (retval) | |
1536 | goto out; | |
1537 | ||
1538 | retval = prepare_binprm(bprm); | |
1539 | if (retval < 0) | |
1540 | goto out; | |
1541 | ||
1542 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1543 | if (retval < 0) | |
1544 | goto out; | |
1545 | ||
1546 | bprm->exec = bprm->p; | |
1547 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1548 | if (retval < 0) | |
1549 | goto out; | |
1550 | ||
1551 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1552 | if (retval < 0) | |
1553 | goto out; | |
1554 | ||
1555 | retval = search_binary_handler(bprm, regs); | |
1556 | if (retval >= 0) { | |
1557 | free_arg_pages(bprm); | |
1558 | ||
1559 | /* execve success */ | |
1560 | security_bprm_free(bprm); | |
4a805e86 | 1561 | acct_update_integrals(current); |
1da177e4 LT |
1562 | kfree(bprm); |
1563 | return retval; | |
1564 | } | |
1565 | ||
1566 | out: | |
1567 | /* Something went wrong, return the inode and free the argument pages*/ | |
1568 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1569 | struct page * page = bprm->page[i]; | |
1570 | if (page) | |
1571 | __free_page(page); | |
1572 | } | |
1573 | ||
1574 | if (bprm->security) | |
1575 | security_bprm_free(bprm); | |
1576 | ||
1577 | out_mm: | |
1578 | if (bprm->mm) | |
1579 | mmdrop(bprm->mm); | |
1580 | ||
1581 | out_file: | |
1582 | if (bprm->file) { | |
1583 | allow_write_access(bprm->file); | |
1584 | fput(bprm->file); | |
1585 | } | |
1586 | ||
1587 | out_kfree: | |
1588 | kfree(bprm); | |
1589 | ||
1590 | out_ret: | |
1591 | return retval; | |
1592 | } | |
1593 | ||
1594 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1595 | ||
1596 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1597 | ||
1598 | /* | |
1599 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1600 | * 64-bit unsigned longs. | |
1601 | */ | |
858119e1 | 1602 | static |
1da177e4 LT |
1603 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1604 | unsigned long *fdset) | |
1605 | { | |
1606 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1607 | if (ufdset) { | |
1608 | unsigned long odd; | |
1609 | ||
1610 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1611 | return -EFAULT; | |
1612 | ||
1613 | odd = nr & 1UL; | |
1614 | nr &= ~1UL; | |
1615 | while (nr) { | |
1616 | unsigned long h, l; | |
7116e994 HC |
1617 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1618 | return -EFAULT; | |
1da177e4 LT |
1619 | ufdset += 2; |
1620 | *fdset++ = h << 32 | l; | |
1621 | nr -= 2; | |
1622 | } | |
7116e994 HC |
1623 | if (odd && __get_user(*fdset, ufdset)) |
1624 | return -EFAULT; | |
1da177e4 LT |
1625 | } else { |
1626 | /* Tricky, must clear full unsigned long in the | |
1627 | * kernel fdset at the end, this makes sure that | |
1628 | * actually happens. | |
1629 | */ | |
1630 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1631 | } | |
1632 | return 0; | |
1633 | } | |
1634 | ||
858119e1 | 1635 | static |
7116e994 HC |
1636 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1637 | unsigned long *fdset) | |
1da177e4 LT |
1638 | { |
1639 | unsigned long odd; | |
1640 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1641 | ||
1642 | if (!ufdset) | |
7116e994 | 1643 | return 0; |
1da177e4 LT |
1644 | |
1645 | odd = nr & 1UL; | |
1646 | nr &= ~1UL; | |
1647 | while (nr) { | |
1648 | unsigned long h, l; | |
1649 | l = *fdset++; | |
1650 | h = l >> 32; | |
7116e994 HC |
1651 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1652 | return -EFAULT; | |
1da177e4 LT |
1653 | ufdset += 2; |
1654 | nr -= 2; | |
1655 | } | |
7116e994 HC |
1656 | if (odd && __put_user(*fdset, ufdset)) |
1657 | return -EFAULT; | |
1658 | return 0; | |
1da177e4 LT |
1659 | } |
1660 | ||
1661 | ||
1662 | /* | |
1663 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1664 | * should be compared to it from time to time | |
1665 | */ | |
1da177e4 LT |
1666 | |
1667 | /* | |
1668 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1669 | * like to be certain this leads to no problems. So I return | |
1670 | * EINTR just for safety. | |
1671 | * | |
1672 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1673 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1674 | */ | |
1675 | #define MAX_SELECT_SECONDS \ | |
1676 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1677 | ||
9f72949f DW |
1678 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1679 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) | |
1da177e4 LT |
1680 | { |
1681 | fd_set_bits fds; | |
1682 | char *bits; | |
bbea9f69 | 1683 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1684 | struct fdtable *fdt; |
1da177e4 | 1685 | |
1da177e4 LT |
1686 | if (n < 0) |
1687 | goto out_nofds; | |
1688 | ||
bbea9f69 | 1689 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1690 | rcu_read_lock(); |
a4531edd | 1691 | fdt = files_fdtable(current->files); |
bbea9f69 | 1692 | max_fds = fdt->max_fds; |
ac5b8b6f | 1693 | rcu_read_unlock(); |
bbea9f69 VL |
1694 | if (n > max_fds) |
1695 | n = max_fds; | |
1da177e4 LT |
1696 | |
1697 | /* | |
1698 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1699 | * since we used fdset we need to allocate memory in units of | |
1700 | * long-words. | |
1701 | */ | |
1702 | ret = -ENOMEM; | |
1703 | size = FDS_BYTES(n); | |
68c3431a | 1704 | bits = kmalloc(6 * size, GFP_KERNEL); |
1da177e4 LT |
1705 | if (!bits) |
1706 | goto out_nofds; | |
1707 | fds.in = (unsigned long *) bits; | |
1708 | fds.out = (unsigned long *) (bits + size); | |
1709 | fds.ex = (unsigned long *) (bits + 2*size); | |
1710 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1711 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1712 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1713 | ||
1714 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1715 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1716 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1717 | goto out; | |
1718 | zero_fd_set(n, fds.res_in); | |
1719 | zero_fd_set(n, fds.res_out); | |
1720 | zero_fd_set(n, fds.res_ex); | |
1721 | ||
9f72949f | 1722 | ret = do_select(n, &fds, timeout); |
1da177e4 LT |
1723 | |
1724 | if (ret < 0) | |
1725 | goto out; | |
1726 | if (!ret) { | |
1727 | ret = -ERESTARTNOHAND; | |
1728 | if (signal_pending(current)) | |
1729 | goto out; | |
1730 | ret = 0; | |
1731 | } | |
1732 | ||
7116e994 HC |
1733 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1734 | compat_set_fd_set(n, outp, fds.res_out) || | |
1735 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1736 | ret = -EFAULT; | |
1da177e4 | 1737 | out: |
68c3431a | 1738 | kfree(bits); |
1da177e4 LT |
1739 | out_nofds: |
1740 | return ret; | |
1741 | } | |
1742 | ||
9f72949f DW |
1743 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1744 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1745 | struct compat_timeval __user *tvp) | |
1746 | { | |
1747 | s64 timeout = -1; | |
1748 | struct compat_timeval tv; | |
1749 | int ret; | |
1750 | ||
1751 | if (tvp) { | |
1752 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1753 | return -EFAULT; | |
1754 | ||
1755 | if (tv.tv_sec < 0 || tv.tv_usec < 0) | |
1756 | return -EINVAL; | |
1757 | ||
1758 | /* Cast to u64 to make GCC stop complaining */ | |
1759 | if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) | |
1760 | timeout = -1; /* infinite */ | |
1761 | else { | |
7e732bfc | 1762 | timeout = ROUND_UP(tv.tv_usec, 1000000/HZ); |
9f72949f DW |
1763 | timeout += tv.tv_sec * HZ; |
1764 | } | |
1765 | } | |
1766 | ||
1767 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1768 | ||
1769 | if (tvp) { | |
643a6545 AM |
1770 | struct compat_timeval rtv; |
1771 | ||
9f72949f DW |
1772 | if (current->personality & STICKY_TIMEOUTS) |
1773 | goto sticky; | |
643a6545 AM |
1774 | rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)); |
1775 | rtv.tv_sec = timeout; | |
74910e6c | 1776 | if (compat_timeval_compare(&rtv, &tv) >= 0) |
643a6545 AM |
1777 | rtv = tv; |
1778 | if (copy_to_user(tvp, &rtv, sizeof(rtv))) { | |
9f72949f DW |
1779 | sticky: |
1780 | /* | |
1781 | * If an application puts its timeval in read-only | |
1782 | * memory, we don't want the Linux-specific update to | |
1783 | * the timeval to cause a fault after the select has | |
1784 | * completed successfully. However, because we're not | |
1785 | * updating the timeval, we can't restart the system | |
1786 | * call. | |
1787 | */ | |
1788 | if (ret == -ERESTARTNOHAND) | |
1789 | ret = -EINTR; | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | return ret; | |
1794 | } | |
1795 | ||
1796 | #ifdef TIF_RESTORE_SIGMASK | |
1797 | asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, | |
1798 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1799 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1800 | compat_size_t sigsetsize) | |
1801 | { | |
1802 | compat_sigset_t ss32; | |
1803 | sigset_t ksigmask, sigsaved; | |
cb82a6cd | 1804 | s64 timeout = MAX_SCHEDULE_TIMEOUT; |
9f72949f DW |
1805 | struct compat_timespec ts; |
1806 | int ret; | |
1807 | ||
1808 | if (tsp) { | |
1809 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1810 | return -EFAULT; | |
1811 | ||
1812 | if (ts.tv_sec < 0 || ts.tv_nsec < 0) | |
1813 | return -EINVAL; | |
1814 | } | |
1815 | ||
1816 | if (sigmask) { | |
1817 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1818 | return -EINVAL; | |
1819 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1820 | return -EFAULT; | |
1821 | sigset_from_compat(&ksigmask, &ss32); | |
1822 | ||
1823 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1824 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1825 | } | |
1826 | ||
1827 | do { | |
1828 | if (tsp) { | |
1829 | if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { | |
1830 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); | |
1831 | timeout += ts.tv_sec * (unsigned long)HZ; | |
1832 | ts.tv_sec = 0; | |
1833 | ts.tv_nsec = 0; | |
1834 | } else { | |
1835 | ts.tv_sec -= MAX_SELECT_SECONDS; | |
1836 | timeout = MAX_SELECT_SECONDS * HZ; | |
1837 | } | |
1838 | } | |
1839 | ||
1840 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1841 | ||
1842 | } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec)); | |
1843 | ||
87c2b7c0 | 1844 | if (tsp) { |
643a6545 AM |
1845 | struct compat_timespec rts; |
1846 | ||
87c2b7c0 HC |
1847 | if (current->personality & STICKY_TIMEOUTS) |
1848 | goto sticky; | |
1849 | ||
643a6545 AM |
1850 | rts.tv_sec = timeout / HZ; |
1851 | rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ); | |
1852 | if (rts.tv_nsec >= NSEC_PER_SEC) { | |
1853 | rts.tv_sec++; | |
1854 | rts.tv_nsec -= NSEC_PER_SEC; | |
9f72949f | 1855 | } |
74910e6c | 1856 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 | 1857 | rts = ts; |
87c2b7c0 HC |
1858 | if (copy_to_user(tsp, &rts, sizeof(rts))) { |
1859 | sticky: | |
1860 | /* | |
1861 | * If an application puts its timeval in read-only | |
1862 | * memory, we don't want the Linux-specific update to | |
1863 | * the timeval to cause a fault after the select has | |
1864 | * completed successfully. However, because we're not | |
1865 | * updating the timeval, we can't restart the system | |
1866 | * call. | |
1867 | */ | |
1868 | if (ret == -ERESTARTNOHAND) | |
1869 | ret = -EINTR; | |
1870 | } | |
9f72949f DW |
1871 | } |
1872 | ||
1873 | if (ret == -ERESTARTNOHAND) { | |
1874 | /* | |
1875 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1876 | * the signal on the way back to userspace, before the signal | |
1877 | * mask is restored. | |
1878 | */ | |
1879 | if (sigmask) { | |
1880 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1881 | sizeof(sigsaved)); | |
1882 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1883 | } | |
1884 | } else if (sigmask) | |
1885 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1886 | ||
1887 | return ret; | |
1888 | } | |
1889 | ||
1890 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1891 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1892 | struct compat_timespec __user *tsp, void __user *sig) | |
1893 | { | |
1894 | compat_size_t sigsetsize = 0; | |
1895 | compat_uptr_t up = 0; | |
1896 | ||
1897 | if (sig) { | |
1898 | if (!access_ok(VERIFY_READ, sig, | |
1899 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1900 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1901 | __get_user(sigsetsize, | |
1902 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1903 | return -EFAULT; | |
1904 | } | |
1905 | return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up), | |
1906 | sigsetsize); | |
1907 | } | |
1908 | ||
1909 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1910 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1911 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1912 | { | |
1913 | compat_sigset_t ss32; | |
1914 | sigset_t ksigmask, sigsaved; | |
1915 | struct compat_timespec ts; | |
1916 | s64 timeout = -1; | |
1917 | int ret; | |
1918 | ||
1919 | if (tsp) { | |
1920 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1921 | return -EFAULT; | |
1922 | ||
1923 | /* We assume that ts.tv_sec is always lower than | |
1924 | the number of seconds that can be expressed in | |
1925 | an s64. Otherwise the compiler bitches at us */ | |
7e732bfc | 1926 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1927 | timeout += ts.tv_sec * HZ; |
1928 | } | |
1929 | ||
1930 | if (sigmask) { | |
3835a9bd | 1931 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1932 | return -EINVAL; |
1933 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1934 | return -EFAULT; | |
1935 | sigset_from_compat(&ksigmask, &ss32); | |
1936 | ||
1937 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1938 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1939 | } | |
1940 | ||
1941 | ret = do_sys_poll(ufds, nfds, &timeout); | |
1942 | ||
1943 | /* We can restart this syscall, usually */ | |
1944 | if (ret == -EINTR) { | |
1945 | /* | |
1946 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1947 | * the signal on the way back to userspace, before the signal | |
1948 | * mask is restored. | |
1949 | */ | |
1950 | if (sigmask) { | |
1951 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1952 | sizeof(sigsaved)); | |
1953 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1954 | } | |
1955 | ret = -ERESTARTNOHAND; | |
1956 | } else if (sigmask) | |
1957 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1958 | ||
1959 | if (tsp && timeout >= 0) { | |
643a6545 AM |
1960 | struct compat_timespec rts; |
1961 | ||
9f72949f DW |
1962 | if (current->personality & STICKY_TIMEOUTS) |
1963 | goto sticky; | |
1964 | /* Yes, we know it's actually an s64, but it's also positive. */ | |
643a6545 AM |
1965 | rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) * |
1966 | 1000; | |
1967 | rts.tv_sec = timeout; | |
74910e6c | 1968 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1969 | rts = ts; |
1970 | if (copy_to_user(tsp, &rts, sizeof(rts))) { | |
9f72949f DW |
1971 | sticky: |
1972 | /* | |
1973 | * If an application puts its timeval in read-only | |
1974 | * memory, we don't want the Linux-specific update to | |
1975 | * the timeval to cause a fault after the select has | |
1976 | * completed successfully. However, because we're not | |
1977 | * updating the timeval, we can't restart the system | |
1978 | * call. | |
1979 | */ | |
1980 | if (ret == -ERESTARTNOHAND && timeout >= 0) | |
1981 | ret = -EINTR; | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | return ret; | |
1986 | } | |
1987 | #endif /* TIF_RESTORE_SIGMASK */ | |
1988 | ||
1da177e4 LT |
1989 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1990 | /* Stuff for NFS server syscalls... */ | |
1991 | struct compat_nfsctl_svc { | |
1992 | u16 svc32_port; | |
1993 | s32 svc32_nthreads; | |
1994 | }; | |
1995 | ||
1996 | struct compat_nfsctl_client { | |
1997 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1998 | s32 cl32_naddr; | |
1999 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
2000 | s32 cl32_fhkeytype; | |
2001 | s32 cl32_fhkeylen; | |
2002 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
2003 | }; | |
2004 | ||
2005 | struct compat_nfsctl_export { | |
2006 | char ex32_client[NFSCLNT_IDMAX+1]; | |
2007 | char ex32_path[NFS_MAXPATHLEN+1]; | |
2008 | compat_dev_t ex32_dev; | |
2009 | compat_ino_t ex32_ino; | |
2010 | compat_int_t ex32_flags; | |
202e5979 SR |
2011 | __compat_uid_t ex32_anon_uid; |
2012 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
2013 | }; |
2014 | ||
2015 | struct compat_nfsctl_fdparm { | |
2016 | struct sockaddr gd32_addr; | |
2017 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2018 | compat_int_t gd32_version; | |
2019 | }; | |
2020 | ||
2021 | struct compat_nfsctl_fsparm { | |
2022 | struct sockaddr gd32_addr; | |
2023 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2024 | compat_int_t gd32_maxlen; | |
2025 | }; | |
2026 | ||
2027 | struct compat_nfsctl_arg { | |
2028 | compat_int_t ca32_version; /* safeguard */ | |
2029 | union { | |
2030 | struct compat_nfsctl_svc u32_svc; | |
2031 | struct compat_nfsctl_client u32_client; | |
2032 | struct compat_nfsctl_export u32_export; | |
2033 | struct compat_nfsctl_fdparm u32_getfd; | |
2034 | struct compat_nfsctl_fsparm u32_getfs; | |
2035 | } u; | |
2036 | #define ca32_svc u.u32_svc | |
2037 | #define ca32_client u.u32_client | |
2038 | #define ca32_export u.u32_export | |
2039 | #define ca32_getfd u.u32_getfd | |
2040 | #define ca32_getfs u.u32_getfs | |
2041 | }; | |
2042 | ||
2043 | union compat_nfsctl_res { | |
2044 | __u8 cr32_getfh[NFS_FHSIZE]; | |
2045 | struct knfsd_fh cr32_getfs; | |
2046 | }; | |
2047 | ||
d64b1c87 LFS |
2048 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
2049 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2050 | { |
d64b1c87 LFS |
2051 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2052 | get_user(karg->ca_version, &arg->ca32_version) || | |
2053 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2054 | __get_user(karg->ca_svc.svc_nthreads, | |
2055 | &arg->ca32_svc.svc32_nthreads)) | |
2056 | return -EFAULT; | |
2057 | return 0; | |
1da177e4 LT |
2058 | } |
2059 | ||
d64b1c87 LFS |
2060 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2061 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2062 | { |
d64b1c87 LFS |
2063 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2064 | sizeof(arg->ca32_client)) || | |
2065 | get_user(karg->ca_version, &arg->ca32_version) || | |
2066 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2067 | &arg->ca32_client.cl32_ident[0], | |
2068 | NFSCLNT_IDMAX) || | |
2069 | __get_user(karg->ca_client.cl_naddr, | |
2070 | &arg->ca32_client.cl32_naddr) || | |
2071 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2072 | &arg->ca32_client.cl32_addrlist[0], | |
2073 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2074 | __get_user(karg->ca_client.cl_fhkeytype, | |
2075 | &arg->ca32_client.cl32_fhkeytype) || | |
2076 | __get_user(karg->ca_client.cl_fhkeylen, | |
2077 | &arg->ca32_client.cl32_fhkeylen) || | |
2078 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2079 | &arg->ca32_client.cl32_fhkey[0], | |
2080 | NFSCLNT_KEYMAX)) | |
2081 | return -EFAULT; | |
1da177e4 | 2082 | |
d64b1c87 | 2083 | return 0; |
1da177e4 LT |
2084 | } |
2085 | ||
d64b1c87 LFS |
2086 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2087 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2088 | { |
d64b1c87 LFS |
2089 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2090 | sizeof(arg->ca32_export)) || | |
2091 | get_user(karg->ca_version, &arg->ca32_version) || | |
2092 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2093 | &arg->ca32_export.ex32_client[0], | |
2094 | NFSCLNT_IDMAX) || | |
2095 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2096 | &arg->ca32_export.ex32_path[0], | |
2097 | NFS_MAXPATHLEN) || | |
2098 | __get_user(karg->ca_export.ex_dev, | |
2099 | &arg->ca32_export.ex32_dev) || | |
2100 | __get_user(karg->ca_export.ex_ino, | |
2101 | &arg->ca32_export.ex32_ino) || | |
2102 | __get_user(karg->ca_export.ex_flags, | |
2103 | &arg->ca32_export.ex32_flags) || | |
2104 | __get_user(karg->ca_export.ex_anon_uid, | |
2105 | &arg->ca32_export.ex32_anon_uid) || | |
2106 | __get_user(karg->ca_export.ex_anon_gid, | |
2107 | &arg->ca32_export.ex32_anon_gid)) | |
2108 | return -EFAULT; | |
1da177e4 LT |
2109 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2110 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2111 | ||
d64b1c87 | 2112 | return 0; |
1da177e4 LT |
2113 | } |
2114 | ||
d64b1c87 LFS |
2115 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2116 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2117 | { |
d64b1c87 LFS |
2118 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2119 | sizeof(arg->ca32_getfd)) || | |
2120 | get_user(karg->ca_version, &arg->ca32_version) || | |
2121 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2122 | &arg->ca32_getfd.gd32_addr, | |
2123 | (sizeof(struct sockaddr))) || | |
2124 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2125 | &arg->ca32_getfd.gd32_path, | |
2126 | (NFS_MAXPATHLEN+1)) || | |
2127 | __get_user(karg->ca_getfd.gd_version, | |
2128 | &arg->ca32_getfd.gd32_version)) | |
2129 | return -EFAULT; | |
1da177e4 | 2130 | |
d64b1c87 | 2131 | return 0; |
1da177e4 LT |
2132 | } |
2133 | ||
d64b1c87 LFS |
2134 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2135 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2136 | { |
d64b1c87 LFS |
2137 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2138 | get_user(karg->ca_version, &arg->ca32_version) || | |
2139 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2140 | &arg->ca32_getfs.gd32_addr, | |
2141 | (sizeof(struct sockaddr))) || | |
2142 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2143 | &arg->ca32_getfs.gd32_path, | |
2144 | (NFS_MAXPATHLEN+1)) || | |
2145 | __get_user(karg->ca_getfs.gd_maxlen, | |
2146 | &arg->ca32_getfs.gd32_maxlen)) | |
2147 | return -EFAULT; | |
1da177e4 | 2148 | |
d64b1c87 | 2149 | return 0; |
1da177e4 LT |
2150 | } |
2151 | ||
2152 | /* This really doesn't need translations, we are only passing | |
2153 | * back a union which contains opaque nfs file handle data. | |
2154 | */ | |
d64b1c87 LFS |
2155 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2156 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2157 | { |
2158 | int err; | |
2159 | ||
2160 | err = copy_to_user(res, kres, sizeof(*res)); | |
2161 | ||
2162 | return (err) ? -EFAULT : 0; | |
2163 | } | |
2164 | ||
d64b1c87 LFS |
2165 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2166 | struct compat_nfsctl_arg __user *arg, | |
2167 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2168 | { |
2169 | struct nfsctl_arg *karg; | |
2170 | union nfsctl_res *kres; | |
2171 | mm_segment_t oldfs; | |
2172 | int err; | |
2173 | ||
2174 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2175 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2176 | if(!karg || !kres) { | |
2177 | err = -ENOMEM; | |
2178 | goto done; | |
2179 | } | |
2180 | ||
2181 | switch(cmd) { | |
2182 | case NFSCTL_SVC: | |
2183 | err = compat_nfs_svc_trans(karg, arg); | |
2184 | break; | |
2185 | ||
2186 | case NFSCTL_ADDCLIENT: | |
2187 | err = compat_nfs_clnt_trans(karg, arg); | |
2188 | break; | |
2189 | ||
2190 | case NFSCTL_DELCLIENT: | |
2191 | err = compat_nfs_clnt_trans(karg, arg); | |
2192 | break; | |
2193 | ||
2194 | case NFSCTL_EXPORT: | |
2195 | case NFSCTL_UNEXPORT: | |
2196 | err = compat_nfs_exp_trans(karg, arg); | |
2197 | break; | |
2198 | ||
2199 | case NFSCTL_GETFD: | |
2200 | err = compat_nfs_getfd_trans(karg, arg); | |
2201 | break; | |
2202 | ||
2203 | case NFSCTL_GETFS: | |
2204 | err = compat_nfs_getfs_trans(karg, arg); | |
2205 | break; | |
2206 | ||
2207 | default: | |
2208 | err = -EINVAL; | |
57070d01 | 2209 | break; |
1da177e4 LT |
2210 | } |
2211 | ||
57070d01 PS |
2212 | if (err) |
2213 | goto done; | |
2214 | ||
1da177e4 LT |
2215 | oldfs = get_fs(); |
2216 | set_fs(KERNEL_DS); | |
2217 | /* The __user pointer casts are valid because of the set_fs() */ | |
2218 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2219 | set_fs(oldfs); | |
2220 | ||
2221 | if (err) | |
2222 | goto done; | |
2223 | ||
2224 | if((cmd == NFSCTL_GETFD) || | |
2225 | (cmd == NFSCTL_GETFS)) | |
2226 | err = compat_nfs_getfh_res_trans(kres, res); | |
2227 | ||
2228 | done: | |
2229 | kfree(karg); | |
2230 | kfree(kres); | |
2231 | return err; | |
2232 | } | |
2233 | #else /* !NFSD */ | |
2234 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2235 | { | |
2236 | return sys_ni_syscall(); | |
2237 | } | |
2238 | #endif | |
f6dfb4fd DL |
2239 | |
2240 | #ifdef CONFIG_EPOLL | |
2241 | ||
2242 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2243 | asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd, | |
2244 | struct compat_epoll_event __user *event) | |
2245 | { | |
2246 | long err = 0; | |
2247 | struct compat_epoll_event user; | |
2248 | struct epoll_event __user *kernel = NULL; | |
2249 | ||
2250 | if (event) { | |
2251 | if (copy_from_user(&user, event, sizeof(user))) | |
2252 | return -EFAULT; | |
2253 | kernel = compat_alloc_user_space(sizeof(struct epoll_event)); | |
2254 | err |= __put_user(user.events, &kernel->events); | |
2255 | err |= __put_user(user.data, &kernel->data); | |
2256 | } | |
2257 | ||
2258 | return err ? err : sys_epoll_ctl(epfd, op, fd, kernel); | |
2259 | } | |
2260 | ||
2261 | ||
2262 | asmlinkage long compat_sys_epoll_wait(int epfd, | |
2263 | struct compat_epoll_event __user *events, | |
2264 | int maxevents, int timeout) | |
2265 | { | |
2266 | long i, ret, err = 0; | |
2267 | struct epoll_event __user *kbuf; | |
2268 | struct epoll_event ev; | |
2269 | ||
2270 | if ((maxevents <= 0) || | |
2271 | (maxevents > (INT_MAX / sizeof(struct epoll_event)))) | |
2272 | return -EINVAL; | |
2273 | kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents); | |
2274 | ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout); | |
2275 | for (i = 0; i < ret; i++) { | |
2276 | err |= __get_user(ev.events, &kbuf[i].events); | |
2277 | err |= __get_user(ev.data, &kbuf[i].data); | |
2278 | err |= __put_user(ev.events, &events->events); | |
2279 | err |= __put_user_unaligned(ev.data, &events->data); | |
2280 | events++; | |
2281 | } | |
2282 | ||
2283 | return err ? -EFAULT: ret; | |
2284 | } | |
2285 | #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */ | |
2286 | ||
2287 | #ifdef TIF_RESTORE_SIGMASK | |
2288 | asmlinkage long compat_sys_epoll_pwait(int epfd, | |
2289 | struct compat_epoll_event __user *events, | |
2290 | int maxevents, int timeout, | |
2291 | const compat_sigset_t __user *sigmask, | |
2292 | compat_size_t sigsetsize) | |
2293 | { | |
2294 | long err; | |
2295 | compat_sigset_t csigmask; | |
2296 | sigset_t ksigmask, sigsaved; | |
2297 | ||
2298 | /* | |
2299 | * If the caller wants a certain signal mask to be set during the wait, | |
2300 | * we apply it here. | |
2301 | */ | |
2302 | if (sigmask) { | |
2303 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2304 | return -EINVAL; | |
2305 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2306 | return -EFAULT; | |
2307 | sigset_from_compat(&ksigmask, &csigmask); | |
2308 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2309 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2310 | } | |
2311 | ||
2312 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2313 | err = compat_sys_epoll_wait(epfd, events, maxevents, timeout); | |
2314 | #else | |
2315 | err = sys_epoll_wait(epfd, events, maxevents, timeout); | |
2316 | #endif | |
2317 | ||
2318 | /* | |
2319 | * If we changed the signal mask, we need to restore the original one. | |
2320 | * In case we've got a signal while waiting, we do not restore the | |
2321 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2322 | * the way back to userspace, before the signal mask is restored. | |
2323 | */ | |
2324 | if (sigmask) { | |
2325 | if (err == -EINTR) { | |
2326 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2327 | sizeof(sigsaved)); | |
2328 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
2329 | } else | |
2330 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2331 | } | |
2332 | ||
2333 | return err; | |
2334 | } | |
2335 | #endif /* TIF_RESTORE_SIGMASK */ | |
2336 | ||
2337 | #endif /* CONFIG_EPOLL */ |