Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/compat.c | |
3 | * | |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support | |
5 | * on 64 bit kernels. | |
6 | * | |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation | |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
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> | |
4a805e86 DM |
47 | #include <linux/acct.h> |
48 | #include <linux/mm.h> | |
1da177e4 LT |
49 | |
50 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
51 | ||
52 | #include <asm/uaccess.h> | |
53 | #include <asm/mmu_context.h> | |
54 | #include <asm/ioctls.h> | |
55 | ||
9f72949f DW |
56 | extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); |
57 | ||
bebfa101 AK |
58 | int compat_log = 1; |
59 | ||
60 | int compat_printk(const char *fmt, ...) | |
61 | { | |
62 | va_list ap; | |
63 | int ret; | |
64 | if (!compat_log) | |
65 | return 0; | |
66 | va_start(ap, fmt); | |
67 | ret = vprintk(fmt, ap); | |
68 | va_end(ap); | |
69 | return ret; | |
70 | } | |
71 | ||
1da177e4 LT |
72 | /* |
73 | * Not all architectures have sys_utime, so implement this in terms | |
74 | * of sys_utimes. | |
75 | */ | |
76 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
77 | { | |
78 | struct timeval tv[2]; | |
79 | ||
80 | if (t) { | |
81 | if (get_user(tv[0].tv_sec, &t->actime) || | |
82 | get_user(tv[1].tv_sec, &t->modtime)) | |
83 | return -EFAULT; | |
84 | tv[0].tv_usec = 0; | |
85 | tv[1].tv_usec = 0; | |
86 | } | |
5590ff0d | 87 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL); |
1da177e4 LT |
88 | } |
89 | ||
9ad11ab4 | 90 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 LT |
91 | { |
92 | struct timeval tv[2]; | |
93 | ||
9ad11ab4 | 94 | if (t) { |
1da177e4 LT |
95 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
96 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
97 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
98 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
9ad11ab4 SR |
99 | return -EFAULT; |
100 | } | |
5590ff0d UD |
101 | return do_utimes(dfd, filename, t ? tv : NULL); |
102 | } | |
103 | ||
104 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
105 | { | |
106 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
107 | } |
108 | ||
109 | asmlinkage long compat_sys_newstat(char __user * filename, | |
110 | struct compat_stat __user *statbuf) | |
111 | { | |
112 | struct kstat stat; | |
5590ff0d | 113 | int error = vfs_stat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
114 | |
115 | if (!error) | |
116 | error = cp_compat_stat(&stat, statbuf); | |
117 | return error; | |
118 | } | |
119 | ||
120 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
121 | struct compat_stat __user *statbuf) | |
122 | { | |
123 | struct kstat stat; | |
5590ff0d | 124 | int error = vfs_lstat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
125 | |
126 | if (!error) | |
127 | error = cp_compat_stat(&stat, statbuf); | |
128 | return error; | |
129 | } | |
130 | ||
82d821dd | 131 | #ifndef __ARCH_WANT_STAT64 |
9ad11ab4 | 132 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
133 | struct compat_stat __user *statbuf, int flag) |
134 | { | |
135 | struct kstat stat; | |
136 | int error = -EINVAL; | |
137 | ||
138 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
139 | goto out; | |
140 | ||
141 | if (flag & AT_SYMLINK_NOFOLLOW) | |
142 | error = vfs_lstat_fd(dfd, filename, &stat); | |
143 | else | |
144 | error = vfs_stat_fd(dfd, filename, &stat); | |
145 | ||
146 | if (!error) | |
147 | error = cp_compat_stat(&stat, statbuf); | |
148 | ||
149 | out: | |
150 | return error; | |
151 | } | |
82d821dd | 152 | #endif |
5590ff0d | 153 | |
1da177e4 LT |
154 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
155 | struct compat_stat __user * statbuf) | |
156 | { | |
157 | struct kstat stat; | |
158 | int error = vfs_fstat(fd, &stat); | |
159 | ||
160 | if (!error) | |
161 | error = cp_compat_stat(&stat, statbuf); | |
162 | return error; | |
163 | } | |
164 | ||
165 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
166 | { | |
167 | ||
168 | if (sizeof ubuf->f_blocks == 4) { | |
169 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
170 | 0xffffffff00000000ULL) | |
171 | return -EOVERFLOW; | |
172 | /* f_files and f_ffree may be -1; it's okay | |
173 | * to stuff that into 32 bits */ | |
174 | if (kbuf->f_files != 0xffffffffffffffffULL | |
175 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
176 | return -EOVERFLOW; | |
177 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
178 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
179 | return -EOVERFLOW; | |
180 | } | |
181 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
182 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
183 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
184 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
185 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
186 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
187 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
188 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
189 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
190 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
191 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
192 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
193 | __put_user(0, &ubuf->f_spare[0]) || | |
194 | __put_user(0, &ubuf->f_spare[1]) || | |
195 | __put_user(0, &ubuf->f_spare[2]) || | |
196 | __put_user(0, &ubuf->f_spare[3]) || | |
197 | __put_user(0, &ubuf->f_spare[4])) | |
198 | return -EFAULT; | |
199 | return 0; | |
200 | } | |
201 | ||
202 | /* | |
203 | * The following statfs calls are copies of code from fs/open.c and | |
204 | * should be checked against those from time to time | |
205 | */ | |
206 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
207 | { | |
208 | struct nameidata nd; | |
209 | int error; | |
210 | ||
211 | error = user_path_walk(path, &nd); | |
212 | if (!error) { | |
213 | struct kstatfs tmp; | |
726c3342 | 214 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
215 | if (!error) |
216 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
217 | path_release(&nd); |
218 | } | |
219 | return error; | |
220 | } | |
221 | ||
222 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
223 | { | |
224 | struct file * file; | |
225 | struct kstatfs tmp; | |
226 | int error; | |
227 | ||
228 | error = -EBADF; | |
229 | file = fget(fd); | |
230 | if (!file) | |
231 | goto out; | |
726c3342 | 232 | error = vfs_statfs(file->f_dentry, &tmp); |
86e07ce7 DG |
233 | if (!error) |
234 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
235 | fput(file); |
236 | out: | |
237 | return error; | |
238 | } | |
239 | ||
240 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
241 | { | |
242 | if (sizeof ubuf->f_blocks == 4) { | |
243 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
244 | 0xffffffff00000000ULL) | |
245 | return -EOVERFLOW; | |
246 | /* f_files and f_ffree may be -1; it's okay | |
247 | * to stuff that into 32 bits */ | |
248 | if (kbuf->f_files != 0xffffffffffffffffULL | |
249 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
250 | return -EOVERFLOW; | |
251 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
252 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
253 | return -EOVERFLOW; | |
254 | } | |
255 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
256 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
257 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
258 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
259 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
260 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
261 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
262 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
263 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
264 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
265 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
266 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
267 | return -EFAULT; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
272 | { | |
273 | struct nameidata nd; | |
274 | int error; | |
275 | ||
276 | if (sz != sizeof(*buf)) | |
277 | return -EINVAL; | |
278 | ||
279 | error = user_path_walk(path, &nd); | |
280 | if (!error) { | |
281 | struct kstatfs tmp; | |
726c3342 | 282 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
283 | if (!error) |
284 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
285 | path_release(&nd); |
286 | } | |
287 | return error; | |
288 | } | |
289 | ||
290 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
291 | { | |
292 | struct file * file; | |
293 | struct kstatfs tmp; | |
294 | int error; | |
295 | ||
296 | if (sz != sizeof(*buf)) | |
297 | return -EINVAL; | |
298 | ||
299 | error = -EBADF; | |
300 | file = fget(fd); | |
301 | if (!file) | |
302 | goto out; | |
726c3342 | 303 | error = vfs_statfs(file->f_dentry, &tmp); |
86e07ce7 DG |
304 | if (!error) |
305 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
306 | fput(file); |
307 | out: | |
308 | return error; | |
309 | } | |
310 | ||
311 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
312 | ||
313 | #define IOCTL_HASHSIZE 256 | |
314 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
1da177e4 LT |
315 | |
316 | extern struct ioctl_trans ioctl_start[]; | |
317 | extern int ioctl_table_size; | |
318 | ||
319 | static inline unsigned long ioctl32_hash(unsigned long cmd) | |
320 | { | |
321 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
322 | } | |
323 | ||
324 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
325 | { | |
326 | unsigned long hash; | |
327 | struct ioctl_trans *t; | |
328 | ||
329 | hash = ioctl32_hash (trans->cmd); | |
330 | if (!ioctl32_hash_table[hash]) | |
331 | ioctl32_hash_table[hash] = trans; | |
332 | else { | |
333 | t = ioctl32_hash_table[hash]; | |
334 | while (t->next) | |
335 | t = t->next; | |
336 | trans->next = NULL; | |
337 | t->next = trans; | |
338 | } | |
339 | } | |
340 | ||
341 | static int __init init_sys32_ioctl(void) | |
342 | { | |
343 | int i; | |
344 | ||
345 | for (i = 0; i < ioctl_table_size; i++) { | |
346 | if (ioctl_start[i].next != 0) { | |
347 | printk("ioctl translation %d bad\n",i); | |
348 | return -1; | |
349 | } | |
350 | ||
351 | ioctl32_insert_translation(&ioctl_start[i]); | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | __initcall(init_sys32_ioctl); | |
357 | ||
1da177e4 LT |
358 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
359 | unsigned int cmd, unsigned long arg) | |
360 | { | |
361 | char buf[10]; | |
362 | char *fn = "?"; | |
363 | char *path; | |
364 | ||
365 | /* find the name of the device. */ | |
366 | path = (char *)__get_free_page(GFP_KERNEL); | |
367 | if (path) { | |
368 | fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); | |
369 | if (IS_ERR(fn)) | |
370 | fn = "?"; | |
371 | } | |
372 | ||
373 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); | |
374 | if (!isprint(buf[1])) | |
375 | sprintf(buf, "%02x", buf[1]); | |
bebfa101 | 376 | compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
1da177e4 LT |
377 | "cmd(%08x){%s} arg(%08x) on %s\n", |
378 | current->comm, current->pid, | |
379 | (int)fd, (unsigned int)cmd, buf, | |
380 | (unsigned int)arg, fn); | |
381 | ||
382 | if (path) | |
383 | free_page((unsigned long)path); | |
384 | } | |
385 | ||
386 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
387 | unsigned long arg) | |
388 | { | |
389 | struct file *filp; | |
390 | int error = -EBADF; | |
391 | struct ioctl_trans *t; | |
392 | int fput_needed; | |
393 | ||
394 | filp = fget_light(fd, &fput_needed); | |
395 | if (!filp) | |
396 | goto out; | |
397 | ||
398 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
399 | error = security_file_ioctl(filp, cmd, arg); | |
400 | if (error) | |
401 | goto out_fput; | |
402 | ||
403 | /* | |
404 | * To allow the compat_ioctl handlers to be self contained | |
405 | * we need to check the common ioctls here first. | |
406 | * Just handle them with the standard handlers below. | |
407 | */ | |
408 | switch (cmd) { | |
409 | case FIOCLEX: | |
410 | case FIONCLEX: | |
411 | case FIONBIO: | |
412 | case FIOASYNC: | |
413 | case FIOQSIZE: | |
414 | break; | |
415 | ||
416 | case FIBMAP: | |
417 | case FIGETBSZ: | |
418 | case FIONREAD: | |
419 | if (S_ISREG(filp->f_dentry->d_inode->i_mode)) | |
420 | break; | |
421 | /*FALL THROUGH*/ | |
422 | ||
423 | default: | |
424 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
425 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
426 | if (error != -ENOIOCTLCMD) | |
427 | goto out_fput; | |
428 | } | |
429 | ||
430 | if (!filp->f_op || | |
431 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
432 | goto do_ioctl; | |
433 | break; | |
434 | } | |
435 | ||
1da177e4 LT |
436 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
437 | if (t->cmd == cmd) | |
438 | goto found_handler; | |
439 | } | |
1da177e4 LT |
440 | |
441 | if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && | |
442 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
443 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
444 | } else { | |
445 | static int count; | |
446 | ||
447 | if (++count <= 50) | |
448 | compat_ioctl_error(filp, fd, cmd, arg); | |
449 | error = -EINVAL; | |
450 | } | |
451 | ||
452 | goto out_fput; | |
453 | ||
454 | found_handler: | |
455 | if (t->handler) { | |
456 | lock_kernel(); | |
457 | error = t->handler(fd, cmd, arg, filp); | |
458 | unlock_kernel(); | |
1da177e4 LT |
459 | goto out_fput; |
460 | } | |
461 | ||
1da177e4 LT |
462 | do_ioctl: |
463 | error = vfs_ioctl(filp, fd, cmd, arg); | |
464 | out_fput: | |
465 | fput_light(filp, fput_needed); | |
466 | out: | |
467 | return error; | |
468 | } | |
469 | ||
470 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
471 | { | |
472 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
473 | __get_user(kfl->l_type, &ufl->l_type) || | |
474 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
475 | __get_user(kfl->l_start, &ufl->l_start) || | |
476 | __get_user(kfl->l_len, &ufl->l_len) || | |
477 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
478 | return -EFAULT; | |
479 | return 0; | |
480 | } | |
481 | ||
482 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
483 | { | |
484 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
485 | __put_user(kfl->l_type, &ufl->l_type) || | |
486 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
487 | __put_user(kfl->l_start, &ufl->l_start) || | |
488 | __put_user(kfl->l_len, &ufl->l_len) || | |
489 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
490 | return -EFAULT; | |
491 | return 0; | |
492 | } | |
493 | ||
494 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
495 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
496 | { | |
497 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
498 | __get_user(kfl->l_type, &ufl->l_type) || | |
499 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
500 | __get_user(kfl->l_start, &ufl->l_start) || | |
501 | __get_user(kfl->l_len, &ufl->l_len) || | |
502 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
503 | return -EFAULT; | |
504 | return 0; | |
505 | } | |
506 | #endif | |
507 | ||
508 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
509 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
510 | { | |
511 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
512 | __put_user(kfl->l_type, &ufl->l_type) || | |
513 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
514 | __put_user(kfl->l_start, &ufl->l_start) || | |
515 | __put_user(kfl->l_len, &ufl->l_len) || | |
516 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
517 | return -EFAULT; | |
518 | return 0; | |
519 | } | |
520 | #endif | |
521 | ||
522 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
523 | unsigned long arg) | |
524 | { | |
525 | mm_segment_t old_fs; | |
526 | struct flock f; | |
527 | long ret; | |
528 | ||
529 | switch (cmd) { | |
530 | case F_GETLK: | |
531 | case F_SETLK: | |
532 | case F_SETLKW: | |
533 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
534 | if (ret != 0) | |
535 | break; | |
536 | old_fs = get_fs(); | |
537 | set_fs(KERNEL_DS); | |
538 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
539 | set_fs(old_fs); | |
540 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
541 | /* GETLK was successfule and we need to return the data... |
542 | * but it needs to fit in the compat structure. | |
543 | * l_start shouldn't be too big, unless the original | |
544 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
545 | * case the app was asking for trouble, so we return | |
546 | * -EOVERFLOW in that case. | |
547 | * l_len could be too big, in which case we just truncate it, | |
548 | * and only allow the app to see that part of the conflicting | |
549 | * lock that might make sense to it anyway | |
550 | */ | |
551 | ||
552 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 553 | ret = -EOVERFLOW; |
2520f14c N |
554 | if (f.l_len > COMPAT_OFF_T_MAX) |
555 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
556 | if (ret == 0) |
557 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
558 | } | |
559 | break; | |
560 | ||
561 | case F_GETLK64: | |
562 | case F_SETLK64: | |
563 | case F_SETLKW64: | |
564 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
565 | if (ret != 0) | |
566 | break; | |
567 | old_fs = get_fs(); | |
568 | set_fs(KERNEL_DS); | |
569 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
570 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
571 | (unsigned long)&f); | |
572 | set_fs(old_fs); | |
573 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
574 | /* need to return lock information - see above for commentary */ |
575 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 576 | ret = -EOVERFLOW; |
2520f14c N |
577 | if (f.l_len > COMPAT_LOFF_T_MAX) |
578 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
579 | if (ret == 0) |
580 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
581 | } | |
582 | break; | |
583 | ||
584 | default: | |
585 | ret = sys_fcntl(fd, cmd, arg); | |
586 | break; | |
587 | } | |
588 | return ret; | |
589 | } | |
590 | ||
591 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
592 | unsigned long arg) | |
593 | { | |
594 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
595 | return -EINVAL; | |
596 | return compat_sys_fcntl64(fd, cmd, arg); | |
597 | } | |
598 | ||
599 | asmlinkage long | |
600 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
601 | { | |
602 | long ret; | |
603 | aio_context_t ctx64; | |
604 | ||
605 | mm_segment_t oldfs = get_fs(); | |
606 | if (unlikely(get_user(ctx64, ctx32p))) | |
607 | return -EFAULT; | |
608 | ||
609 | set_fs(KERNEL_DS); | |
610 | /* The __user pointer cast is valid because of the set_fs() */ | |
611 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
612 | set_fs(oldfs); | |
613 | /* truncating is ok because it's a user address */ | |
614 | if (!ret) | |
615 | ret = put_user((u32) ctx64, ctx32p); | |
616 | return ret; | |
617 | } | |
618 | ||
619 | asmlinkage long | |
620 | compat_sys_io_getevents(aio_context_t ctx_id, | |
621 | unsigned long min_nr, | |
622 | unsigned long nr, | |
623 | struct io_event __user *events, | |
624 | struct compat_timespec __user *timeout) | |
625 | { | |
626 | long ret; | |
627 | struct timespec t; | |
628 | struct timespec __user *ut = NULL; | |
629 | ||
630 | ret = -EFAULT; | |
631 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
632 | nr * sizeof(struct io_event)))) | |
633 | goto out; | |
634 | if (timeout) { | |
635 | if (get_compat_timespec(&t, timeout)) | |
636 | goto out; | |
637 | ||
638 | ut = compat_alloc_user_space(sizeof(*ut)); | |
639 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
640 | goto out; | |
641 | } | |
642 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
643 | out: | |
644 | return ret; | |
645 | } | |
646 | ||
647 | static inline long | |
648 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
649 | { | |
650 | compat_uptr_t uptr; | |
651 | int i; | |
652 | ||
653 | for (i = 0; i < nr; ++i) { | |
654 | if (get_user(uptr, ptr32 + i)) | |
655 | return -EFAULT; | |
656 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
657 | return -EFAULT; | |
658 | } | |
659 | return 0; | |
660 | } | |
661 | ||
662 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
663 | ||
664 | asmlinkage long | |
665 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
666 | { | |
667 | struct iocb __user * __user *iocb64; | |
668 | long ret; | |
669 | ||
670 | if (unlikely(nr < 0)) | |
671 | return -EINVAL; | |
672 | ||
673 | if (nr > MAX_AIO_SUBMITS) | |
674 | nr = MAX_AIO_SUBMITS; | |
675 | ||
676 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
677 | ret = copy_iocb(nr, iocb, iocb64); | |
678 | if (!ret) | |
679 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
680 | return ret; | |
681 | } | |
682 | ||
683 | struct compat_ncp_mount_data { | |
684 | compat_int_t version; | |
685 | compat_uint_t ncp_fd; | |
202e5979 | 686 | __compat_uid_t mounted_uid; |
1da177e4 LT |
687 | compat_pid_t wdog_pid; |
688 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
689 | compat_uint_t time_out; | |
690 | compat_uint_t retry_count; | |
691 | compat_uint_t flags; | |
202e5979 SR |
692 | __compat_uid_t uid; |
693 | __compat_gid_t gid; | |
1da177e4 LT |
694 | compat_mode_t file_mode; |
695 | compat_mode_t dir_mode; | |
696 | }; | |
697 | ||
698 | struct compat_ncp_mount_data_v4 { | |
699 | compat_int_t version; | |
700 | compat_ulong_t flags; | |
701 | compat_ulong_t mounted_uid; | |
702 | compat_long_t wdog_pid; | |
703 | compat_uint_t ncp_fd; | |
704 | compat_uint_t time_out; | |
705 | compat_uint_t retry_count; | |
706 | compat_ulong_t uid; | |
707 | compat_ulong_t gid; | |
708 | compat_ulong_t file_mode; | |
709 | compat_ulong_t dir_mode; | |
710 | }; | |
711 | ||
712 | static void *do_ncp_super_data_conv(void *raw_data) | |
713 | { | |
714 | int version = *(unsigned int *)raw_data; | |
715 | ||
716 | if (version == 3) { | |
717 | struct compat_ncp_mount_data *c_n = raw_data; | |
718 | struct ncp_mount_data *n = raw_data; | |
719 | ||
720 | n->dir_mode = c_n->dir_mode; | |
721 | n->file_mode = c_n->file_mode; | |
722 | n->gid = c_n->gid; | |
723 | n->uid = c_n->uid; | |
724 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
725 | n->wdog_pid = c_n->wdog_pid; | |
726 | n->mounted_uid = c_n->mounted_uid; | |
727 | } else if (version == 4) { | |
728 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
729 | struct ncp_mount_data_v4 *n = raw_data; | |
730 | ||
731 | n->dir_mode = c_n->dir_mode; | |
732 | n->file_mode = c_n->file_mode; | |
733 | n->gid = c_n->gid; | |
734 | n->uid = c_n->uid; | |
735 | n->retry_count = c_n->retry_count; | |
736 | n->time_out = c_n->time_out; | |
737 | n->ncp_fd = c_n->ncp_fd; | |
738 | n->wdog_pid = c_n->wdog_pid; | |
739 | n->mounted_uid = c_n->mounted_uid; | |
740 | n->flags = c_n->flags; | |
741 | } else if (version != 5) { | |
742 | return NULL; | |
743 | } | |
744 | ||
745 | return raw_data; | |
746 | } | |
747 | ||
748 | struct compat_smb_mount_data { | |
749 | compat_int_t version; | |
202e5979 SR |
750 | __compat_uid_t mounted_uid; |
751 | __compat_uid_t uid; | |
752 | __compat_gid_t gid; | |
1da177e4 LT |
753 | compat_mode_t file_mode; |
754 | compat_mode_t dir_mode; | |
755 | }; | |
756 | ||
757 | static void *do_smb_super_data_conv(void *raw_data) | |
758 | { | |
759 | struct smb_mount_data *s = raw_data; | |
760 | struct compat_smb_mount_data *c_s = raw_data; | |
761 | ||
762 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
763 | goto out; | |
764 | s->dir_mode = c_s->dir_mode; | |
765 | s->file_mode = c_s->file_mode; | |
766 | s->gid = c_s->gid; | |
767 | s->uid = c_s->uid; | |
768 | s->mounted_uid = c_s->mounted_uid; | |
769 | out: | |
770 | return raw_data; | |
771 | } | |
772 | ||
9a9947bf DH |
773 | struct compat_nfs_string { |
774 | compat_uint_t len; | |
5fc3e624 | 775 | compat_uptr_t data; |
9a9947bf DH |
776 | }; |
777 | ||
778 | static inline void compat_nfs_string(struct nfs_string *dst, | |
779 | struct compat_nfs_string *src) | |
780 | { | |
781 | dst->data = compat_ptr(src->data); | |
782 | dst->len = src->len; | |
783 | } | |
784 | ||
785 | struct compat_nfs4_mount_data_v1 { | |
786 | compat_int_t version; | |
787 | compat_int_t flags; | |
788 | compat_int_t rsize; | |
789 | compat_int_t wsize; | |
790 | compat_int_t timeo; | |
791 | compat_int_t retrans; | |
792 | compat_int_t acregmin; | |
793 | compat_int_t acregmax; | |
794 | compat_int_t acdirmin; | |
795 | compat_int_t acdirmax; | |
796 | struct compat_nfs_string client_addr; | |
797 | struct compat_nfs_string mnt_path; | |
798 | struct compat_nfs_string hostname; | |
799 | compat_uint_t host_addrlen; | |
5fc3e624 | 800 | compat_uptr_t host_addr; |
9a9947bf DH |
801 | compat_int_t proto; |
802 | compat_int_t auth_flavourlen; | |
5fc3e624 | 803 | compat_uptr_t auth_flavours; |
9a9947bf DH |
804 | }; |
805 | ||
806 | static int do_nfs4_super_data_conv(void *raw_data) | |
807 | { | |
808 | int version = *(compat_uint_t *) raw_data; | |
809 | ||
810 | if (version == 1) { | |
811 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
812 | struct nfs4_mount_data *real = raw_data; | |
813 | ||
814 | /* copy the fields backwards */ | |
815 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
816 | real->auth_flavourlen = raw->auth_flavourlen; | |
817 | real->proto = raw->proto; | |
818 | real->host_addr = compat_ptr(raw->host_addr); | |
819 | real->host_addrlen = raw->host_addrlen; | |
820 | compat_nfs_string(&real->hostname, &raw->hostname); | |
821 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
822 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
823 | real->acdirmax = raw->acdirmax; | |
824 | real->acdirmin = raw->acdirmin; | |
825 | real->acregmax = raw->acregmax; | |
826 | real->acregmin = raw->acregmin; | |
827 | real->retrans = raw->retrans; | |
828 | real->timeo = raw->timeo; | |
829 | real->wsize = raw->wsize; | |
830 | real->rsize = raw->rsize; | |
831 | real->flags = raw->flags; | |
832 | real->version = raw->version; | |
833 | } | |
834 | else { | |
835 | return -EINVAL; | |
836 | } | |
837 | ||
838 | return 0; | |
839 | } | |
840 | ||
1da177e4 LT |
841 | extern int copy_mount_options (const void __user *, unsigned long *); |
842 | ||
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 | ||
876 | if (type_page) { | |
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, | |
921 | loff_t offset, ino_t ino, unsigned int d_type) | |
922 | { | |
923 | struct compat_readdir_callback *buf = __buf; | |
924 | struct compat_old_linux_dirent __user *dirent; | |
925 | ||
926 | if (buf->result) | |
927 | return -EINVAL; | |
928 | buf->result++; | |
929 | dirent = buf->dirent; | |
930 | if (!access_ok(VERIFY_WRITE, dirent, | |
931 | (unsigned long)(dirent->d_name + namlen + 1) - | |
932 | (unsigned long)dirent)) | |
933 | goto efault; | |
934 | if ( __put_user(ino, &dirent->d_ino) || | |
935 | __put_user(offset, &dirent->d_offset) || | |
936 | __put_user(namlen, &dirent->d_namlen) || | |
937 | __copy_to_user(dirent->d_name, name, namlen) || | |
938 | __put_user(0, dirent->d_name + namlen)) | |
939 | goto efault; | |
940 | return 0; | |
941 | efault: | |
942 | buf->result = -EFAULT; | |
943 | return -EFAULT; | |
944 | } | |
945 | ||
946 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
947 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
948 | { | |
949 | int error; | |
950 | struct file *file; | |
951 | struct compat_readdir_callback buf; | |
952 | ||
953 | error = -EBADF; | |
954 | file = fget(fd); | |
955 | if (!file) | |
956 | goto out; | |
957 | ||
958 | buf.result = 0; | |
959 | buf.dirent = dirent; | |
960 | ||
961 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
962 | if (error >= 0) | |
963 | error = buf.result; | |
964 | ||
965 | fput(file); | |
966 | out: | |
967 | return error; | |
968 | } | |
969 | ||
970 | struct compat_linux_dirent { | |
971 | compat_ulong_t d_ino; | |
972 | compat_ulong_t d_off; | |
973 | unsigned short d_reclen; | |
974 | char d_name[1]; | |
975 | }; | |
976 | ||
977 | struct compat_getdents_callback { | |
978 | struct compat_linux_dirent __user *current_dir; | |
979 | struct compat_linux_dirent __user *previous; | |
980 | int count; | |
981 | int error; | |
982 | }; | |
983 | ||
984 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
985 | loff_t offset, ino_t ino, unsigned int d_type) | |
986 | { | |
987 | struct compat_linux_dirent __user * dirent; | |
988 | struct compat_getdents_callback *buf = __buf; | |
989 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); | |
990 | ||
991 | buf->error = -EINVAL; /* only used if we fail.. */ | |
992 | if (reclen > buf->count) | |
993 | return -EINVAL; | |
994 | dirent = buf->previous; | |
995 | if (dirent) { | |
996 | if (__put_user(offset, &dirent->d_off)) | |
997 | goto efault; | |
998 | } | |
999 | dirent = buf->current_dir; | |
1000 | if (__put_user(ino, &dirent->d_ino)) | |
1001 | goto efault; | |
1002 | if (__put_user(reclen, &dirent->d_reclen)) | |
1003 | goto efault; | |
1004 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1005 | goto efault; | |
1006 | if (__put_user(0, dirent->d_name + namlen)) | |
1007 | goto efault; | |
1008 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
1009 | goto efault; | |
1010 | buf->previous = dirent; | |
1011 | dirent = (void __user *)dirent + reclen; | |
1012 | buf->current_dir = dirent; | |
1013 | buf->count -= reclen; | |
1014 | return 0; | |
1015 | efault: | |
1016 | buf->error = -EFAULT; | |
1017 | return -EFAULT; | |
1018 | } | |
1019 | ||
1020 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1021 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1022 | { | |
1023 | struct file * file; | |
1024 | struct compat_linux_dirent __user * lastdirent; | |
1025 | struct compat_getdents_callback buf; | |
1026 | int error; | |
1027 | ||
1028 | error = -EFAULT; | |
1029 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1030 | goto out; | |
1031 | ||
1032 | error = -EBADF; | |
1033 | file = fget(fd); | |
1034 | if (!file) | |
1035 | goto out; | |
1036 | ||
1037 | buf.current_dir = dirent; | |
1038 | buf.previous = NULL; | |
1039 | buf.count = count; | |
1040 | buf.error = 0; | |
1041 | ||
1042 | error = vfs_readdir(file, compat_filldir, &buf); | |
1043 | if (error < 0) | |
1044 | goto out_putf; | |
1045 | error = buf.error; | |
1046 | lastdirent = buf.previous; | |
1047 | if (lastdirent) { | |
1048 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1049 | error = -EFAULT; | |
1050 | else | |
1051 | error = count - buf.count; | |
1052 | } | |
1053 | ||
1054 | out_putf: | |
1055 | fput(file); | |
1056 | out: | |
1057 | return error; | |
1058 | } | |
1059 | ||
1060 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1061 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1062 | ||
1063 | struct compat_getdents_callback64 { | |
1064 | struct linux_dirent64 __user *current_dir; | |
1065 | struct linux_dirent64 __user *previous; | |
1066 | int count; | |
1067 | int error; | |
1068 | }; | |
1069 | ||
1070 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
1071 | ino_t ino, unsigned int d_type) | |
1072 | { | |
1073 | struct linux_dirent64 __user *dirent; | |
1074 | struct compat_getdents_callback64 *buf = __buf; | |
1075 | int jj = NAME_OFFSET(dirent); | |
1076 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1077 | u64 off; | |
1078 | ||
1079 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1080 | if (reclen > buf->count) | |
1081 | return -EINVAL; | |
1082 | dirent = buf->previous; | |
1083 | ||
1084 | if (dirent) { | |
1085 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1086 | goto efault; | |
1087 | } | |
1088 | dirent = buf->current_dir; | |
1089 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1090 | goto efault; | |
1091 | off = 0; | |
1092 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1093 | goto efault; | |
1094 | if (__put_user(reclen, &dirent->d_reclen)) | |
1095 | goto efault; | |
1096 | if (__put_user(d_type, &dirent->d_type)) | |
1097 | goto efault; | |
1098 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1099 | goto efault; | |
1100 | if (__put_user(0, dirent->d_name + namlen)) | |
1101 | goto efault; | |
1102 | buf->previous = dirent; | |
1103 | dirent = (void __user *)dirent + reclen; | |
1104 | buf->current_dir = dirent; | |
1105 | buf->count -= reclen; | |
1106 | return 0; | |
1107 | efault: | |
1108 | buf->error = -EFAULT; | |
1109 | return -EFAULT; | |
1110 | } | |
1111 | ||
1112 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1113 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1114 | { | |
1115 | struct file * file; | |
1116 | struct linux_dirent64 __user * lastdirent; | |
1117 | struct compat_getdents_callback64 buf; | |
1118 | int error; | |
1119 | ||
1120 | error = -EFAULT; | |
1121 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1122 | goto out; | |
1123 | ||
1124 | error = -EBADF; | |
1125 | file = fget(fd); | |
1126 | if (!file) | |
1127 | goto out; | |
1128 | ||
1129 | buf.current_dir = dirent; | |
1130 | buf.previous = NULL; | |
1131 | buf.count = count; | |
1132 | buf.error = 0; | |
1133 | ||
1134 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1135 | if (error < 0) | |
1136 | goto out_putf; | |
1137 | error = buf.error; | |
1138 | lastdirent = buf.previous; | |
1139 | if (lastdirent) { | |
1140 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
1141 | __put_user_unaligned(d_off, &lastdirent->d_off); | |
1142 | error = count - buf.count; | |
1143 | } | |
1144 | ||
1145 | out_putf: | |
1146 | fput(file); | |
1147 | out: | |
1148 | return error; | |
1149 | } | |
1150 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1151 | ||
1152 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1153 | const struct compat_iovec __user *uvector, | |
1154 | unsigned long nr_segs, loff_t *pos) | |
1155 | { | |
1156 | typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *); | |
1157 | typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *); | |
1158 | ||
1159 | compat_ssize_t tot_len; | |
1160 | struct iovec iovstack[UIO_FASTIOV]; | |
1161 | struct iovec *iov=iovstack, *vector; | |
1162 | ssize_t ret; | |
1163 | int seg; | |
1164 | io_fn_t fn; | |
1165 | iov_fn_t fnv; | |
1166 | ||
1167 | /* | |
1168 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1169 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1170 | * traditionally returned zero for zero segments, so... | |
1171 | */ | |
1172 | ret = 0; | |
1173 | if (nr_segs == 0) | |
1174 | goto out; | |
1175 | ||
1176 | /* | |
1177 | * First get the "struct iovec" from user memory and | |
1178 | * verify all the pointers | |
1179 | */ | |
1180 | ret = -EINVAL; | |
1181 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1182 | goto out; | |
1183 | if (!file->f_op) | |
1184 | goto out; | |
1185 | if (nr_segs > UIO_FASTIOV) { | |
1186 | ret = -ENOMEM; | |
1187 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1188 | if (!iov) | |
1189 | goto out; | |
1190 | } | |
1191 | ret = -EFAULT; | |
1192 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1193 | goto out; | |
1194 | ||
1195 | /* | |
1196 | * Single unix specification: | |
1197 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1198 | * ssize_t. The total length is fitting an ssize_t | |
1199 | * | |
1200 | * Be careful here because iov_len is a size_t not an ssize_t | |
1201 | */ | |
1202 | tot_len = 0; | |
1203 | vector = iov; | |
1204 | ret = -EINVAL; | |
1205 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1206 | compat_ssize_t tmp = tot_len; | |
1207 | compat_ssize_t len; | |
1208 | compat_uptr_t buf; | |
1209 | ||
1210 | if (__get_user(len, &uvector->iov_len) || | |
1211 | __get_user(buf, &uvector->iov_base)) { | |
1212 | ret = -EFAULT; | |
1213 | goto out; | |
1214 | } | |
1215 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1216 | goto out; | |
1217 | tot_len += len; | |
1218 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1219 | goto out; | |
1220 | vector->iov_base = compat_ptr(buf); | |
1221 | vector->iov_len = (compat_size_t) len; | |
1222 | uvector++; | |
1223 | vector++; | |
1224 | } | |
1225 | if (tot_len == 0) { | |
1226 | ret = 0; | |
1227 | goto out; | |
1228 | } | |
1229 | ||
1230 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1231 | if (ret < 0) |
1da177e4 LT |
1232 | goto out; |
1233 | ||
e7edf9cd JM |
1234 | ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); |
1235 | if (ret) | |
1236 | goto out; | |
1237 | ||
1da177e4 LT |
1238 | fnv = NULL; |
1239 | if (type == READ) { | |
1240 | fn = file->f_op->read; | |
1241 | fnv = file->f_op->readv; | |
1242 | } else { | |
1243 | fn = (io_fn_t)file->f_op->write; | |
1244 | fnv = file->f_op->writev; | |
1245 | } | |
1246 | if (fnv) { | |
1247 | ret = fnv(file, iov, nr_segs, pos); | |
1248 | goto out; | |
1249 | } | |
1250 | ||
1251 | /* Do it by hand, with file-ops */ | |
1252 | ret = 0; | |
1253 | vector = iov; | |
1254 | while (nr_segs > 0) { | |
1255 | void __user * base; | |
1256 | size_t len; | |
1257 | ssize_t nr; | |
1258 | ||
1259 | base = vector->iov_base; | |
1260 | len = vector->iov_len; | |
1261 | vector++; | |
1262 | nr_segs--; | |
1263 | ||
1264 | nr = fn(file, base, len, pos); | |
1265 | ||
1266 | if (nr < 0) { | |
1267 | if (!ret) ret = nr; | |
1268 | break; | |
1269 | } | |
1270 | ret += nr; | |
1271 | if (nr != len) | |
1272 | break; | |
1273 | } | |
1274 | out: | |
1275 | if (iov != iovstack) | |
1276 | kfree(iov); | |
0eeca283 RL |
1277 | if ((ret + (type == READ)) > 0) { |
1278 | struct dentry *dentry = file->f_dentry; | |
1279 | if (type == READ) | |
1280 | fsnotify_access(dentry); | |
1281 | else | |
1282 | fsnotify_modify(dentry); | |
1283 | } | |
1da177e4 LT |
1284 | return ret; |
1285 | } | |
1286 | ||
1287 | asmlinkage ssize_t | |
1288 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1289 | { | |
1290 | struct file *file; | |
1291 | ssize_t ret = -EBADF; | |
1292 | ||
1293 | file = fget(fd); | |
1294 | if (!file) | |
1295 | return -EBADF; | |
1296 | ||
1297 | if (!(file->f_mode & FMODE_READ)) | |
1298 | goto out; | |
1299 | ||
1300 | ret = -EINVAL; | |
1301 | if (!file->f_op || (!file->f_op->readv && !file->f_op->read)) | |
1302 | goto out; | |
1303 | ||
1304 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1305 | ||
1306 | out: | |
1307 | fput(file); | |
1308 | return ret; | |
1309 | } | |
1310 | ||
1311 | asmlinkage ssize_t | |
1312 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1313 | { | |
1314 | struct file *file; | |
1315 | ssize_t ret = -EBADF; | |
1316 | ||
1317 | file = fget(fd); | |
1318 | if (!file) | |
1319 | return -EBADF; | |
1320 | if (!(file->f_mode & FMODE_WRITE)) | |
1321 | goto out; | |
1322 | ||
1323 | ret = -EINVAL; | |
1324 | if (!file->f_op || (!file->f_op->writev && !file->f_op->write)) | |
1325 | goto out; | |
1326 | ||
1327 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1328 | ||
1329 | out: | |
1330 | fput(file); | |
1331 | return ret; | |
1332 | } | |
1333 | ||
d2610202 AK |
1334 | asmlinkage long |
1335 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1336 | unsigned int nr_segs, unsigned int flags) | |
1337 | { | |
1338 | unsigned i; | |
1339 | struct iovec *iov; | |
98232d50 | 1340 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1341 | return -EINVAL; |
1342 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1343 | for (i = 0; i < nr_segs; i++) { | |
1344 | struct compat_iovec v; | |
1345 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1346 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1347 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1348 | put_user(v.iov_len, &iov[i].iov_len)) | |
1349 | return -EFAULT; | |
1350 | } | |
1351 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1352 | } | |
1353 | ||
e922efc3 MS |
1354 | /* |
1355 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1356 | * O_LARGEFILE flag. | |
1357 | */ | |
1358 | asmlinkage long | |
1359 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1360 | { | |
5590ff0d UD |
1361 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1366 | * O_LARGEFILE flag. | |
1367 | */ | |
1368 | asmlinkage long | |
9ad11ab4 | 1369 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1370 | { |
1371 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1372 | } |
1373 | ||
1da177e4 LT |
1374 | /* |
1375 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1376 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1377 | * and envp pointers. | |
1378 | */ | |
1379 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1380 | { | |
1381 | int i = 0; | |
1382 | ||
1383 | if (argv != NULL) { | |
1384 | for (;;) { | |
1385 | compat_uptr_t p; | |
1386 | ||
1387 | if (get_user(p, argv)) | |
1388 | return -EFAULT; | |
1389 | if (!p) | |
1390 | break; | |
1391 | argv++; | |
1392 | if(++i > max) | |
1393 | return -E2BIG; | |
1394 | } | |
1395 | } | |
1396 | return i; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1401 | * except that it works with 32 bit argv and envp pointers. | |
1402 | */ | |
1403 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1404 | struct linux_binprm *bprm) | |
1405 | { | |
1406 | struct page *kmapped_page = NULL; | |
1407 | char *kaddr = NULL; | |
1408 | int ret; | |
1409 | ||
1410 | while (argc-- > 0) { | |
1411 | compat_uptr_t str; | |
1412 | int len; | |
1413 | unsigned long pos; | |
1414 | ||
1415 | if (get_user(str, argv+argc) || | |
1416 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1417 | ret = -EFAULT; | |
1418 | goto out; | |
1419 | } | |
1420 | ||
1421 | if (bprm->p < len) { | |
1422 | ret = -E2BIG; | |
1423 | goto out; | |
1424 | } | |
1425 | ||
1426 | bprm->p -= len; | |
1427 | /* XXX: add architecture specific overflow check here. */ | |
1428 | pos = bprm->p; | |
1429 | ||
1430 | while (len > 0) { | |
1431 | int i, new, err; | |
1432 | int offset, bytes_to_copy; | |
1433 | struct page *page; | |
1434 | ||
1435 | offset = pos % PAGE_SIZE; | |
1436 | i = pos/PAGE_SIZE; | |
1437 | page = bprm->page[i]; | |
1438 | new = 0; | |
1439 | if (!page) { | |
1440 | page = alloc_page(GFP_HIGHUSER); | |
1441 | bprm->page[i] = page; | |
1442 | if (!page) { | |
1443 | ret = -ENOMEM; | |
1444 | goto out; | |
1445 | } | |
1446 | new = 1; | |
1447 | } | |
1448 | ||
1449 | if (page != kmapped_page) { | |
1450 | if (kmapped_page) | |
1451 | kunmap(kmapped_page); | |
1452 | kmapped_page = page; | |
1453 | kaddr = kmap(kmapped_page); | |
1454 | } | |
1455 | if (new && offset) | |
1456 | memset(kaddr, 0, offset); | |
1457 | bytes_to_copy = PAGE_SIZE - offset; | |
1458 | if (bytes_to_copy > len) { | |
1459 | bytes_to_copy = len; | |
1460 | if (new) | |
1461 | memset(kaddr+offset+len, 0, | |
1462 | PAGE_SIZE-offset-len); | |
1463 | } | |
1464 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1465 | bytes_to_copy); | |
1466 | if (err) { | |
1467 | ret = -EFAULT; | |
1468 | goto out; | |
1469 | } | |
1470 | ||
1471 | pos += bytes_to_copy; | |
1472 | str += bytes_to_copy; | |
1473 | len -= bytes_to_copy; | |
1474 | } | |
1475 | } | |
1476 | ret = 0; | |
1477 | out: | |
1478 | if (kmapped_page) | |
1479 | kunmap(kmapped_page); | |
1480 | return ret; | |
1481 | } | |
1482 | ||
1483 | #ifdef CONFIG_MMU | |
1484 | ||
1485 | #define free_arg_pages(bprm) do { } while (0) | |
1486 | ||
1487 | #else | |
1488 | ||
1489 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1490 | { | |
1491 | int i; | |
1492 | ||
1493 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1494 | if (bprm->page[i]) | |
1495 | __free_page(bprm->page[i]); | |
1496 | bprm->page[i] = NULL; | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | #endif /* CONFIG_MMU */ | |
1501 | ||
1502 | /* | |
1503 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1504 | * that it processes 32 bit argv and envp pointers. | |
1505 | */ | |
1506 | int compat_do_execve(char * filename, | |
1507 | compat_uptr_t __user *argv, | |
1508 | compat_uptr_t __user *envp, | |
1509 | struct pt_regs * regs) | |
1510 | { | |
1511 | struct linux_binprm *bprm; | |
1512 | struct file *file; | |
1513 | int retval; | |
1514 | int i; | |
1515 | ||
1516 | retval = -ENOMEM; | |
11b0b5ab | 1517 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 LT |
1518 | if (!bprm) |
1519 | goto out_ret; | |
1da177e4 LT |
1520 | |
1521 | file = open_exec(filename); | |
1522 | retval = PTR_ERR(file); | |
1523 | if (IS_ERR(file)) | |
1524 | goto out_kfree; | |
1525 | ||
1526 | sched_exec(); | |
1527 | ||
1528 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1529 | bprm->file = file; | |
1530 | bprm->filename = filename; | |
1531 | bprm->interp = filename; | |
1532 | bprm->mm = mm_alloc(); | |
1533 | retval = -ENOMEM; | |
1534 | if (!bprm->mm) | |
1535 | goto out_file; | |
1536 | ||
1537 | retval = init_new_context(current, bprm->mm); | |
1538 | if (retval < 0) | |
1539 | goto out_mm; | |
1540 | ||
1541 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1542 | if ((retval = bprm->argc) < 0) | |
1543 | goto out_mm; | |
1544 | ||
1545 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1546 | if ((retval = bprm->envc) < 0) | |
1547 | goto out_mm; | |
1548 | ||
1549 | retval = security_bprm_alloc(bprm); | |
1550 | if (retval) | |
1551 | goto out; | |
1552 | ||
1553 | retval = prepare_binprm(bprm); | |
1554 | if (retval < 0) | |
1555 | goto out; | |
1556 | ||
1557 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1558 | if (retval < 0) | |
1559 | goto out; | |
1560 | ||
1561 | bprm->exec = bprm->p; | |
1562 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1563 | if (retval < 0) | |
1564 | goto out; | |
1565 | ||
1566 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1567 | if (retval < 0) | |
1568 | goto out; | |
1569 | ||
1570 | retval = search_binary_handler(bprm, regs); | |
1571 | if (retval >= 0) { | |
1572 | free_arg_pages(bprm); | |
1573 | ||
1574 | /* execve success */ | |
1575 | security_bprm_free(bprm); | |
4a805e86 | 1576 | acct_update_integrals(current); |
1da177e4 LT |
1577 | kfree(bprm); |
1578 | return retval; | |
1579 | } | |
1580 | ||
1581 | out: | |
1582 | /* Something went wrong, return the inode and free the argument pages*/ | |
1583 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1584 | struct page * page = bprm->page[i]; | |
1585 | if (page) | |
1586 | __free_page(page); | |
1587 | } | |
1588 | ||
1589 | if (bprm->security) | |
1590 | security_bprm_free(bprm); | |
1591 | ||
1592 | out_mm: | |
1593 | if (bprm->mm) | |
1594 | mmdrop(bprm->mm); | |
1595 | ||
1596 | out_file: | |
1597 | if (bprm->file) { | |
1598 | allow_write_access(bprm->file); | |
1599 | fput(bprm->file); | |
1600 | } | |
1601 | ||
1602 | out_kfree: | |
1603 | kfree(bprm); | |
1604 | ||
1605 | out_ret: | |
1606 | return retval; | |
1607 | } | |
1608 | ||
1609 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1610 | ||
1611 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1612 | ||
1613 | /* | |
1614 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1615 | * 64-bit unsigned longs. | |
1616 | */ | |
858119e1 | 1617 | static |
1da177e4 LT |
1618 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1619 | unsigned long *fdset) | |
1620 | { | |
1621 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1622 | if (ufdset) { | |
1623 | unsigned long odd; | |
1624 | ||
1625 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1626 | return -EFAULT; | |
1627 | ||
1628 | odd = nr & 1UL; | |
1629 | nr &= ~1UL; | |
1630 | while (nr) { | |
1631 | unsigned long h, l; | |
1632 | __get_user(l, ufdset); | |
1633 | __get_user(h, ufdset+1); | |
1634 | ufdset += 2; | |
1635 | *fdset++ = h << 32 | l; | |
1636 | nr -= 2; | |
1637 | } | |
1638 | if (odd) | |
1639 | __get_user(*fdset, ufdset); | |
1640 | } else { | |
1641 | /* Tricky, must clear full unsigned long in the | |
1642 | * kernel fdset at the end, this makes sure that | |
1643 | * actually happens. | |
1644 | */ | |
1645 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1646 | } | |
1647 | return 0; | |
1648 | } | |
1649 | ||
858119e1 | 1650 | static |
1da177e4 LT |
1651 | void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1652 | unsigned long *fdset) | |
1653 | { | |
1654 | unsigned long odd; | |
1655 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1656 | ||
1657 | if (!ufdset) | |
1658 | return; | |
1659 | ||
1660 | odd = nr & 1UL; | |
1661 | nr &= ~1UL; | |
1662 | while (nr) { | |
1663 | unsigned long h, l; | |
1664 | l = *fdset++; | |
1665 | h = l >> 32; | |
1666 | __put_user(l, ufdset); | |
1667 | __put_user(h, ufdset+1); | |
1668 | ufdset += 2; | |
1669 | nr -= 2; | |
1670 | } | |
1671 | if (odd) | |
1672 | __put_user(*fdset, ufdset); | |
1673 | } | |
1674 | ||
1675 | ||
1676 | /* | |
1677 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1678 | * should be compared to it from time to time | |
1679 | */ | |
1da177e4 LT |
1680 | |
1681 | /* | |
1682 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1683 | * like to be certain this leads to no problems. So I return | |
1684 | * EINTR just for safety. | |
1685 | * | |
1686 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1687 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1688 | */ | |
1689 | #define MAX_SELECT_SECONDS \ | |
1690 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1691 | ||
9f72949f DW |
1692 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1693 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) | |
1da177e4 LT |
1694 | { |
1695 | fd_set_bits fds; | |
1696 | char *bits; | |
1da177e4 | 1697 | int size, max_fdset, ret = -EINVAL; |
a4531edd | 1698 | struct fdtable *fdt; |
1da177e4 | 1699 | |
1da177e4 LT |
1700 | if (n < 0) |
1701 | goto out_nofds; | |
1702 | ||
1703 | /* max_fdset can increase, so grab it once to avoid race */ | |
ac5b8b6f | 1704 | rcu_read_lock(); |
a4531edd LT |
1705 | fdt = files_fdtable(current->files); |
1706 | max_fdset = fdt->max_fdset; | |
ac5b8b6f | 1707 | rcu_read_unlock(); |
1da177e4 LT |
1708 | if (n > max_fdset) |
1709 | n = max_fdset; | |
1710 | ||
1711 | /* | |
1712 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1713 | * since we used fdset we need to allocate memory in units of | |
1714 | * long-words. | |
1715 | */ | |
1716 | ret = -ENOMEM; | |
1717 | size = FDS_BYTES(n); | |
68c3431a | 1718 | bits = kmalloc(6 * size, GFP_KERNEL); |
1da177e4 LT |
1719 | if (!bits) |
1720 | goto out_nofds; | |
1721 | fds.in = (unsigned long *) bits; | |
1722 | fds.out = (unsigned long *) (bits + size); | |
1723 | fds.ex = (unsigned long *) (bits + 2*size); | |
1724 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1725 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1726 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1727 | ||
1728 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1729 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1730 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1731 | goto out; | |
1732 | zero_fd_set(n, fds.res_in); | |
1733 | zero_fd_set(n, fds.res_out); | |
1734 | zero_fd_set(n, fds.res_ex); | |
1735 | ||
9f72949f | 1736 | ret = do_select(n, &fds, timeout); |
1da177e4 LT |
1737 | |
1738 | if (ret < 0) | |
1739 | goto out; | |
1740 | if (!ret) { | |
1741 | ret = -ERESTARTNOHAND; | |
1742 | if (signal_pending(current)) | |
1743 | goto out; | |
1744 | ret = 0; | |
1745 | } | |
1746 | ||
1747 | compat_set_fd_set(n, inp, fds.res_in); | |
1748 | compat_set_fd_set(n, outp, fds.res_out); | |
1749 | compat_set_fd_set(n, exp, fds.res_ex); | |
1750 | ||
1751 | out: | |
68c3431a | 1752 | kfree(bits); |
1da177e4 LT |
1753 | out_nofds: |
1754 | return ret; | |
1755 | } | |
1756 | ||
9f72949f DW |
1757 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1758 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1759 | struct compat_timeval __user *tvp) | |
1760 | { | |
1761 | s64 timeout = -1; | |
1762 | struct compat_timeval tv; | |
1763 | int ret; | |
1764 | ||
1765 | if (tvp) { | |
1766 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1767 | return -EFAULT; | |
1768 | ||
1769 | if (tv.tv_sec < 0 || tv.tv_usec < 0) | |
1770 | return -EINVAL; | |
1771 | ||
1772 | /* Cast to u64 to make GCC stop complaining */ | |
1773 | if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) | |
1774 | timeout = -1; /* infinite */ | |
1775 | else { | |
7e732bfc | 1776 | timeout = ROUND_UP(tv.tv_usec, 1000000/HZ); |
9f72949f DW |
1777 | timeout += tv.tv_sec * HZ; |
1778 | } | |
1779 | } | |
1780 | ||
1781 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1782 | ||
1783 | if (tvp) { | |
643a6545 AM |
1784 | struct compat_timeval rtv; |
1785 | ||
9f72949f DW |
1786 | if (current->personality & STICKY_TIMEOUTS) |
1787 | goto sticky; | |
643a6545 AM |
1788 | rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)); |
1789 | rtv.tv_sec = timeout; | |
74910e6c | 1790 | if (compat_timeval_compare(&rtv, &tv) >= 0) |
643a6545 AM |
1791 | rtv = tv; |
1792 | if (copy_to_user(tvp, &rtv, sizeof(rtv))) { | |
9f72949f DW |
1793 | sticky: |
1794 | /* | |
1795 | * If an application puts its timeval in read-only | |
1796 | * memory, we don't want the Linux-specific update to | |
1797 | * the timeval to cause a fault after the select has | |
1798 | * completed successfully. However, because we're not | |
1799 | * updating the timeval, we can't restart the system | |
1800 | * call. | |
1801 | */ | |
1802 | if (ret == -ERESTARTNOHAND) | |
1803 | ret = -EINTR; | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | return ret; | |
1808 | } | |
1809 | ||
1810 | #ifdef TIF_RESTORE_SIGMASK | |
1811 | asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, | |
1812 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1813 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1814 | compat_size_t sigsetsize) | |
1815 | { | |
1816 | compat_sigset_t ss32; | |
1817 | sigset_t ksigmask, sigsaved; | |
cb82a6cd | 1818 | s64 timeout = MAX_SCHEDULE_TIMEOUT; |
9f72949f DW |
1819 | struct compat_timespec ts; |
1820 | int ret; | |
1821 | ||
1822 | if (tsp) { | |
1823 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1824 | return -EFAULT; | |
1825 | ||
1826 | if (ts.tv_sec < 0 || ts.tv_nsec < 0) | |
1827 | return -EINVAL; | |
1828 | } | |
1829 | ||
1830 | if (sigmask) { | |
1831 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1832 | return -EINVAL; | |
1833 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1834 | return -EFAULT; | |
1835 | sigset_from_compat(&ksigmask, &ss32); | |
1836 | ||
1837 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1838 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1839 | } | |
1840 | ||
1841 | do { | |
1842 | if (tsp) { | |
1843 | if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { | |
1844 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); | |
1845 | timeout += ts.tv_sec * (unsigned long)HZ; | |
1846 | ts.tv_sec = 0; | |
1847 | ts.tv_nsec = 0; | |
1848 | } else { | |
1849 | ts.tv_sec -= MAX_SELECT_SECONDS; | |
1850 | timeout = MAX_SELECT_SECONDS * HZ; | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1855 | ||
1856 | } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec)); | |
1857 | ||
1858 | if (tsp && !(current->personality & STICKY_TIMEOUTS)) { | |
643a6545 AM |
1859 | struct compat_timespec rts; |
1860 | ||
1861 | rts.tv_sec = timeout / HZ; | |
1862 | rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ); | |
1863 | if (rts.tv_nsec >= NSEC_PER_SEC) { | |
1864 | rts.tv_sec++; | |
1865 | rts.tv_nsec -= NSEC_PER_SEC; | |
9f72949f | 1866 | } |
74910e6c | 1867 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1868 | rts = ts; |
1869 | copy_to_user(tsp, &rts, sizeof(rts)); | |
9f72949f DW |
1870 | } |
1871 | ||
1872 | if (ret == -ERESTARTNOHAND) { | |
1873 | /* | |
1874 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1875 | * the signal on the way back to userspace, before the signal | |
1876 | * mask is restored. | |
1877 | */ | |
1878 | if (sigmask) { | |
1879 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1880 | sizeof(sigsaved)); | |
1881 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1882 | } | |
1883 | } else if (sigmask) | |
1884 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1885 | ||
1886 | return ret; | |
1887 | } | |
1888 | ||
1889 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1890 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1891 | struct compat_timespec __user *tsp, void __user *sig) | |
1892 | { | |
1893 | compat_size_t sigsetsize = 0; | |
1894 | compat_uptr_t up = 0; | |
1895 | ||
1896 | if (sig) { | |
1897 | if (!access_ok(VERIFY_READ, sig, | |
1898 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1899 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1900 | __get_user(sigsetsize, | |
1901 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1902 | return -EFAULT; | |
1903 | } | |
1904 | return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up), | |
1905 | sigsetsize); | |
1906 | } | |
1907 | ||
1908 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1909 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1910 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1911 | { | |
1912 | compat_sigset_t ss32; | |
1913 | sigset_t ksigmask, sigsaved; | |
1914 | struct compat_timespec ts; | |
1915 | s64 timeout = -1; | |
1916 | int ret; | |
1917 | ||
1918 | if (tsp) { | |
1919 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1920 | return -EFAULT; | |
1921 | ||
1922 | /* We assume that ts.tv_sec is always lower than | |
1923 | the number of seconds that can be expressed in | |
1924 | an s64. Otherwise the compiler bitches at us */ | |
7e732bfc | 1925 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1926 | timeout += ts.tv_sec * HZ; |
1927 | } | |
1928 | ||
1929 | if (sigmask) { | |
3835a9bd | 1930 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1931 | return -EINVAL; |
1932 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1933 | return -EFAULT; | |
1934 | sigset_from_compat(&ksigmask, &ss32); | |
1935 | ||
1936 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1937 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1938 | } | |
1939 | ||
1940 | ret = do_sys_poll(ufds, nfds, &timeout); | |
1941 | ||
1942 | /* We can restart this syscall, usually */ | |
1943 | if (ret == -EINTR) { | |
1944 | /* | |
1945 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1946 | * the signal on the way back to userspace, before the signal | |
1947 | * mask is restored. | |
1948 | */ | |
1949 | if (sigmask) { | |
1950 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1951 | sizeof(sigsaved)); | |
1952 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1953 | } | |
1954 | ret = -ERESTARTNOHAND; | |
1955 | } else if (sigmask) | |
1956 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1957 | ||
1958 | if (tsp && timeout >= 0) { | |
643a6545 AM |
1959 | struct compat_timespec rts; |
1960 | ||
9f72949f DW |
1961 | if (current->personality & STICKY_TIMEOUTS) |
1962 | goto sticky; | |
1963 | /* Yes, we know it's actually an s64, but it's also positive. */ | |
643a6545 AM |
1964 | rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) * |
1965 | 1000; | |
1966 | rts.tv_sec = timeout; | |
74910e6c | 1967 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1968 | rts = ts; |
1969 | if (copy_to_user(tsp, &rts, sizeof(rts))) { | |
9f72949f DW |
1970 | sticky: |
1971 | /* | |
1972 | * If an application puts its timeval in read-only | |
1973 | * memory, we don't want the Linux-specific update to | |
1974 | * the timeval to cause a fault after the select has | |
1975 | * completed successfully. However, because we're not | |
1976 | * updating the timeval, we can't restart the system | |
1977 | * call. | |
1978 | */ | |
1979 | if (ret == -ERESTARTNOHAND && timeout >= 0) | |
1980 | ret = -EINTR; | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | return ret; | |
1985 | } | |
1986 | #endif /* TIF_RESTORE_SIGMASK */ | |
1987 | ||
1da177e4 LT |
1988 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1989 | /* Stuff for NFS server syscalls... */ | |
1990 | struct compat_nfsctl_svc { | |
1991 | u16 svc32_port; | |
1992 | s32 svc32_nthreads; | |
1993 | }; | |
1994 | ||
1995 | struct compat_nfsctl_client { | |
1996 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1997 | s32 cl32_naddr; | |
1998 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1999 | s32 cl32_fhkeytype; | |
2000 | s32 cl32_fhkeylen; | |
2001 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
2002 | }; | |
2003 | ||
2004 | struct compat_nfsctl_export { | |
2005 | char ex32_client[NFSCLNT_IDMAX+1]; | |
2006 | char ex32_path[NFS_MAXPATHLEN+1]; | |
2007 | compat_dev_t ex32_dev; | |
2008 | compat_ino_t ex32_ino; | |
2009 | compat_int_t ex32_flags; | |
202e5979 SR |
2010 | __compat_uid_t ex32_anon_uid; |
2011 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
2012 | }; |
2013 | ||
2014 | struct compat_nfsctl_fdparm { | |
2015 | struct sockaddr gd32_addr; | |
2016 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2017 | compat_int_t gd32_version; | |
2018 | }; | |
2019 | ||
2020 | struct compat_nfsctl_fsparm { | |
2021 | struct sockaddr gd32_addr; | |
2022 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2023 | compat_int_t gd32_maxlen; | |
2024 | }; | |
2025 | ||
2026 | struct compat_nfsctl_arg { | |
2027 | compat_int_t ca32_version; /* safeguard */ | |
2028 | union { | |
2029 | struct compat_nfsctl_svc u32_svc; | |
2030 | struct compat_nfsctl_client u32_client; | |
2031 | struct compat_nfsctl_export u32_export; | |
2032 | struct compat_nfsctl_fdparm u32_getfd; | |
2033 | struct compat_nfsctl_fsparm u32_getfs; | |
2034 | } u; | |
2035 | #define ca32_svc u.u32_svc | |
2036 | #define ca32_client u.u32_client | |
2037 | #define ca32_export u.u32_export | |
2038 | #define ca32_getfd u.u32_getfd | |
2039 | #define ca32_getfs u.u32_getfs | |
2040 | }; | |
2041 | ||
2042 | union compat_nfsctl_res { | |
2043 | __u8 cr32_getfh[NFS_FHSIZE]; | |
2044 | struct knfsd_fh cr32_getfs; | |
2045 | }; | |
2046 | ||
d64b1c87 LFS |
2047 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
2048 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2049 | { |
d64b1c87 LFS |
2050 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2051 | get_user(karg->ca_version, &arg->ca32_version) || | |
2052 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2053 | __get_user(karg->ca_svc.svc_nthreads, | |
2054 | &arg->ca32_svc.svc32_nthreads)) | |
2055 | return -EFAULT; | |
2056 | return 0; | |
1da177e4 LT |
2057 | } |
2058 | ||
d64b1c87 LFS |
2059 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2060 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2061 | { |
d64b1c87 LFS |
2062 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2063 | sizeof(arg->ca32_client)) || | |
2064 | get_user(karg->ca_version, &arg->ca32_version) || | |
2065 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2066 | &arg->ca32_client.cl32_ident[0], | |
2067 | NFSCLNT_IDMAX) || | |
2068 | __get_user(karg->ca_client.cl_naddr, | |
2069 | &arg->ca32_client.cl32_naddr) || | |
2070 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2071 | &arg->ca32_client.cl32_addrlist[0], | |
2072 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2073 | __get_user(karg->ca_client.cl_fhkeytype, | |
2074 | &arg->ca32_client.cl32_fhkeytype) || | |
2075 | __get_user(karg->ca_client.cl_fhkeylen, | |
2076 | &arg->ca32_client.cl32_fhkeylen) || | |
2077 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2078 | &arg->ca32_client.cl32_fhkey[0], | |
2079 | NFSCLNT_KEYMAX)) | |
2080 | return -EFAULT; | |
1da177e4 | 2081 | |
d64b1c87 | 2082 | return 0; |
1da177e4 LT |
2083 | } |
2084 | ||
d64b1c87 LFS |
2085 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2086 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2087 | { |
d64b1c87 LFS |
2088 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2089 | sizeof(arg->ca32_export)) || | |
2090 | get_user(karg->ca_version, &arg->ca32_version) || | |
2091 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2092 | &arg->ca32_export.ex32_client[0], | |
2093 | NFSCLNT_IDMAX) || | |
2094 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2095 | &arg->ca32_export.ex32_path[0], | |
2096 | NFS_MAXPATHLEN) || | |
2097 | __get_user(karg->ca_export.ex_dev, | |
2098 | &arg->ca32_export.ex32_dev) || | |
2099 | __get_user(karg->ca_export.ex_ino, | |
2100 | &arg->ca32_export.ex32_ino) || | |
2101 | __get_user(karg->ca_export.ex_flags, | |
2102 | &arg->ca32_export.ex32_flags) || | |
2103 | __get_user(karg->ca_export.ex_anon_uid, | |
2104 | &arg->ca32_export.ex32_anon_uid) || | |
2105 | __get_user(karg->ca_export.ex_anon_gid, | |
2106 | &arg->ca32_export.ex32_anon_gid)) | |
2107 | return -EFAULT; | |
1da177e4 LT |
2108 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2109 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2110 | ||
d64b1c87 | 2111 | return 0; |
1da177e4 LT |
2112 | } |
2113 | ||
d64b1c87 LFS |
2114 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2115 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2116 | { |
d64b1c87 LFS |
2117 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2118 | sizeof(arg->ca32_getfd)) || | |
2119 | get_user(karg->ca_version, &arg->ca32_version) || | |
2120 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2121 | &arg->ca32_getfd.gd32_addr, | |
2122 | (sizeof(struct sockaddr))) || | |
2123 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2124 | &arg->ca32_getfd.gd32_path, | |
2125 | (NFS_MAXPATHLEN+1)) || | |
2126 | __get_user(karg->ca_getfd.gd_version, | |
2127 | &arg->ca32_getfd.gd32_version)) | |
2128 | return -EFAULT; | |
1da177e4 | 2129 | |
d64b1c87 | 2130 | return 0; |
1da177e4 LT |
2131 | } |
2132 | ||
d64b1c87 LFS |
2133 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2134 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2135 | { |
d64b1c87 LFS |
2136 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2137 | get_user(karg->ca_version, &arg->ca32_version) || | |
2138 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2139 | &arg->ca32_getfs.gd32_addr, | |
2140 | (sizeof(struct sockaddr))) || | |
2141 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2142 | &arg->ca32_getfs.gd32_path, | |
2143 | (NFS_MAXPATHLEN+1)) || | |
2144 | __get_user(karg->ca_getfs.gd_maxlen, | |
2145 | &arg->ca32_getfs.gd32_maxlen)) | |
2146 | return -EFAULT; | |
1da177e4 | 2147 | |
d64b1c87 | 2148 | return 0; |
1da177e4 LT |
2149 | } |
2150 | ||
2151 | /* This really doesn't need translations, we are only passing | |
2152 | * back a union which contains opaque nfs file handle data. | |
2153 | */ | |
d64b1c87 LFS |
2154 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2155 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2156 | { |
2157 | int err; | |
2158 | ||
2159 | err = copy_to_user(res, kres, sizeof(*res)); | |
2160 | ||
2161 | return (err) ? -EFAULT : 0; | |
2162 | } | |
2163 | ||
d64b1c87 LFS |
2164 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2165 | struct compat_nfsctl_arg __user *arg, | |
2166 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2167 | { |
2168 | struct nfsctl_arg *karg; | |
2169 | union nfsctl_res *kres; | |
2170 | mm_segment_t oldfs; | |
2171 | int err; | |
2172 | ||
2173 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2174 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2175 | if(!karg || !kres) { | |
2176 | err = -ENOMEM; | |
2177 | goto done; | |
2178 | } | |
2179 | ||
2180 | switch(cmd) { | |
2181 | case NFSCTL_SVC: | |
2182 | err = compat_nfs_svc_trans(karg, arg); | |
2183 | break; | |
2184 | ||
2185 | case NFSCTL_ADDCLIENT: | |
2186 | err = compat_nfs_clnt_trans(karg, arg); | |
2187 | break; | |
2188 | ||
2189 | case NFSCTL_DELCLIENT: | |
2190 | err = compat_nfs_clnt_trans(karg, arg); | |
2191 | break; | |
2192 | ||
2193 | case NFSCTL_EXPORT: | |
2194 | case NFSCTL_UNEXPORT: | |
2195 | err = compat_nfs_exp_trans(karg, arg); | |
2196 | break; | |
2197 | ||
2198 | case NFSCTL_GETFD: | |
2199 | err = compat_nfs_getfd_trans(karg, arg); | |
2200 | break; | |
2201 | ||
2202 | case NFSCTL_GETFS: | |
2203 | err = compat_nfs_getfs_trans(karg, arg); | |
2204 | break; | |
2205 | ||
2206 | default: | |
2207 | err = -EINVAL; | |
57070d01 | 2208 | break; |
1da177e4 LT |
2209 | } |
2210 | ||
57070d01 PS |
2211 | if (err) |
2212 | goto done; | |
2213 | ||
1da177e4 LT |
2214 | oldfs = get_fs(); |
2215 | set_fs(KERNEL_DS); | |
2216 | /* The __user pointer casts are valid because of the set_fs() */ | |
2217 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2218 | set_fs(oldfs); | |
2219 | ||
2220 | if (err) | |
2221 | goto done; | |
2222 | ||
2223 | if((cmd == NFSCTL_GETFD) || | |
2224 | (cmd == NFSCTL_GETFS)) | |
2225 | err = compat_nfs_getfh_res_trans(kres, res); | |
2226 | ||
2227 | done: | |
2228 | kfree(karg); | |
2229 | kfree(kres); | |
2230 | return err; | |
2231 | } | |
2232 | #else /* !NFSD */ | |
2233 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2234 | { | |
2235 | return sys_ni_syscall(); | |
2236 | } | |
2237 | #endif |