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> | |
8f0ab514 | 47 | #include <linux/tsacct_kern.h> |
a1f8e7f7 | 48 | #include <linux/highmem.h> |
4a805e86 | 49 | #include <linux/mm.h> |
1da177e4 LT |
50 | |
51 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
52 | ||
53 | #include <asm/uaccess.h> | |
54 | #include <asm/mmu_context.h> | |
55 | #include <asm/ioctls.h> | |
07f3f05c | 56 | #include "internal.h" |
9f72949f | 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 | ||
ee0b3e67 BP |
72 | #include "read_write.h" |
73 | ||
1da177e4 LT |
74 | /* |
75 | * Not all architectures have sys_utime, so implement this in terms | |
76 | * of sys_utimes. | |
77 | */ | |
78 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
79 | { | |
80 | struct timeval tv[2]; | |
81 | ||
82 | if (t) { | |
83 | if (get_user(tv[0].tv_sec, &t->actime) || | |
84 | get_user(tv[1].tv_sec, &t->modtime)) | |
85 | return -EFAULT; | |
86 | tv[0].tv_usec = 0; | |
87 | tv[1].tv_usec = 0; | |
88 | } | |
5590ff0d | 89 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL); |
1da177e4 LT |
90 | } |
91 | ||
9ad11ab4 | 92 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 LT |
93 | { |
94 | struct timeval tv[2]; | |
95 | ||
9ad11ab4 | 96 | if (t) { |
1da177e4 LT |
97 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
98 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
99 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
100 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
9ad11ab4 SR |
101 | return -EFAULT; |
102 | } | |
5590ff0d UD |
103 | return do_utimes(dfd, filename, t ? tv : NULL); |
104 | } | |
105 | ||
106 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
107 | { | |
108 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
109 | } |
110 | ||
111 | asmlinkage long compat_sys_newstat(char __user * filename, | |
112 | struct compat_stat __user *statbuf) | |
113 | { | |
114 | struct kstat stat; | |
5590ff0d | 115 | int error = vfs_stat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
116 | |
117 | if (!error) | |
118 | error = cp_compat_stat(&stat, statbuf); | |
119 | return error; | |
120 | } | |
121 | ||
122 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
123 | struct compat_stat __user *statbuf) | |
124 | { | |
125 | struct kstat stat; | |
5590ff0d | 126 | int error = vfs_lstat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
127 | |
128 | if (!error) | |
129 | error = cp_compat_stat(&stat, statbuf); | |
130 | return error; | |
131 | } | |
132 | ||
82d821dd | 133 | #ifndef __ARCH_WANT_STAT64 |
9ad11ab4 | 134 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
135 | struct compat_stat __user *statbuf, int flag) |
136 | { | |
137 | struct kstat stat; | |
138 | int error = -EINVAL; | |
139 | ||
140 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
141 | goto out; | |
142 | ||
143 | if (flag & AT_SYMLINK_NOFOLLOW) | |
144 | error = vfs_lstat_fd(dfd, filename, &stat); | |
145 | else | |
146 | error = vfs_stat_fd(dfd, filename, &stat); | |
147 | ||
148 | if (!error) | |
149 | error = cp_compat_stat(&stat, statbuf); | |
150 | ||
151 | out: | |
152 | return error; | |
153 | } | |
82d821dd | 154 | #endif |
5590ff0d | 155 | |
1da177e4 LT |
156 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
157 | struct compat_stat __user * statbuf) | |
158 | { | |
159 | struct kstat stat; | |
160 | int error = vfs_fstat(fd, &stat); | |
161 | ||
162 | if (!error) | |
163 | error = cp_compat_stat(&stat, statbuf); | |
164 | return error; | |
165 | } | |
166 | ||
167 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
168 | { | |
169 | ||
170 | if (sizeof ubuf->f_blocks == 4) { | |
171 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
172 | 0xffffffff00000000ULL) | |
173 | return -EOVERFLOW; | |
174 | /* f_files and f_ffree may be -1; it's okay | |
175 | * to stuff that into 32 bits */ | |
176 | if (kbuf->f_files != 0xffffffffffffffffULL | |
177 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
178 | return -EOVERFLOW; | |
179 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
180 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
181 | return -EOVERFLOW; | |
182 | } | |
183 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
184 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
185 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
186 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
187 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
188 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
189 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
190 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
191 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
192 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
193 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
194 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
195 | __put_user(0, &ubuf->f_spare[0]) || | |
196 | __put_user(0, &ubuf->f_spare[1]) || | |
197 | __put_user(0, &ubuf->f_spare[2]) || | |
198 | __put_user(0, &ubuf->f_spare[3]) || | |
199 | __put_user(0, &ubuf->f_spare[4])) | |
200 | return -EFAULT; | |
201 | return 0; | |
202 | } | |
203 | ||
204 | /* | |
205 | * The following statfs calls are copies of code from fs/open.c and | |
206 | * should be checked against those from time to time | |
207 | */ | |
208 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
209 | { | |
210 | struct nameidata nd; | |
211 | int error; | |
212 | ||
213 | error = user_path_walk(path, &nd); | |
214 | if (!error) { | |
215 | struct kstatfs tmp; | |
726c3342 | 216 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
217 | if (!error) |
218 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
219 | path_release(&nd); |
220 | } | |
221 | return error; | |
222 | } | |
223 | ||
224 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
225 | { | |
226 | struct file * file; | |
227 | struct kstatfs tmp; | |
228 | int error; | |
229 | ||
230 | error = -EBADF; | |
231 | file = fget(fd); | |
232 | if (!file) | |
233 | goto out; | |
726c3342 | 234 | error = vfs_statfs(file->f_dentry, &tmp); |
86e07ce7 DG |
235 | if (!error) |
236 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
237 | fput(file); |
238 | out: | |
239 | return error; | |
240 | } | |
241 | ||
242 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
243 | { | |
244 | if (sizeof ubuf->f_blocks == 4) { | |
245 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
246 | 0xffffffff00000000ULL) | |
247 | return -EOVERFLOW; | |
248 | /* f_files and f_ffree may be -1; it's okay | |
249 | * to stuff that into 32 bits */ | |
250 | if (kbuf->f_files != 0xffffffffffffffffULL | |
251 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
252 | return -EOVERFLOW; | |
253 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
254 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
255 | return -EOVERFLOW; | |
256 | } | |
257 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
258 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
259 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
260 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
261 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
262 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
263 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
264 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
265 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
266 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
267 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
268 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
269 | return -EFAULT; | |
270 | return 0; | |
271 | } | |
272 | ||
273 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
274 | { | |
275 | struct nameidata nd; | |
276 | int error; | |
277 | ||
278 | if (sz != sizeof(*buf)) | |
279 | return -EINVAL; | |
280 | ||
281 | error = user_path_walk(path, &nd); | |
282 | if (!error) { | |
283 | struct kstatfs tmp; | |
726c3342 | 284 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
285 | if (!error) |
286 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
287 | path_release(&nd); |
288 | } | |
289 | return error; | |
290 | } | |
291 | ||
292 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
293 | { | |
294 | struct file * file; | |
295 | struct kstatfs tmp; | |
296 | int error; | |
297 | ||
298 | if (sz != sizeof(*buf)) | |
299 | return -EINVAL; | |
300 | ||
301 | error = -EBADF; | |
302 | file = fget(fd); | |
303 | if (!file) | |
304 | goto out; | |
726c3342 | 305 | error = vfs_statfs(file->f_dentry, &tmp); |
86e07ce7 DG |
306 | if (!error) |
307 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
308 | fput(file); |
309 | out: | |
310 | return error; | |
311 | } | |
312 | ||
313 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
314 | ||
315 | #define IOCTL_HASHSIZE 256 | |
316 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
1da177e4 | 317 | |
1da177e4 LT |
318 | static inline unsigned long ioctl32_hash(unsigned long cmd) |
319 | { | |
320 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
321 | } | |
322 | ||
323 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
324 | { | |
325 | unsigned long hash; | |
326 | struct ioctl_trans *t; | |
327 | ||
328 | hash = ioctl32_hash (trans->cmd); | |
329 | if (!ioctl32_hash_table[hash]) | |
330 | ioctl32_hash_table[hash] = trans; | |
331 | else { | |
332 | t = ioctl32_hash_table[hash]; | |
333 | while (t->next) | |
334 | t = t->next; | |
335 | trans->next = NULL; | |
336 | t->next = trans; | |
337 | } | |
338 | } | |
339 | ||
340 | static int __init init_sys32_ioctl(void) | |
341 | { | |
342 | int i; | |
343 | ||
344 | for (i = 0; i < ioctl_table_size; i++) { | |
345 | if (ioctl_start[i].next != 0) { | |
346 | printk("ioctl translation %d bad\n",i); | |
347 | return -1; | |
348 | } | |
349 | ||
350 | ioctl32_insert_translation(&ioctl_start[i]); | |
351 | } | |
352 | return 0; | |
353 | } | |
354 | ||
355 | __initcall(init_sys32_ioctl); | |
356 | ||
1da177e4 LT |
357 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
358 | unsigned int cmd, unsigned long arg) | |
359 | { | |
360 | char buf[10]; | |
361 | char *fn = "?"; | |
362 | char *path; | |
363 | ||
364 | /* find the name of the device. */ | |
365 | path = (char *)__get_free_page(GFP_KERNEL); | |
366 | if (path) { | |
367 | fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); | |
368 | if (IS_ERR(fn)) | |
369 | fn = "?"; | |
370 | } | |
371 | ||
372 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); | |
373 | if (!isprint(buf[1])) | |
374 | sprintf(buf, "%02x", buf[1]); | |
bebfa101 | 375 | compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
1da177e4 LT |
376 | "cmd(%08x){%s} arg(%08x) on %s\n", |
377 | current->comm, current->pid, | |
378 | (int)fd, (unsigned int)cmd, buf, | |
379 | (unsigned int)arg, fn); | |
380 | ||
381 | if (path) | |
382 | free_page((unsigned long)path); | |
383 | } | |
384 | ||
385 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
386 | unsigned long arg) | |
387 | { | |
388 | struct file *filp; | |
389 | int error = -EBADF; | |
390 | struct ioctl_trans *t; | |
391 | int fput_needed; | |
392 | ||
393 | filp = fget_light(fd, &fput_needed); | |
394 | if (!filp) | |
395 | goto out; | |
396 | ||
397 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
398 | error = security_file_ioctl(filp, cmd, arg); | |
399 | if (error) | |
400 | goto out_fput; | |
401 | ||
402 | /* | |
403 | * To allow the compat_ioctl handlers to be self contained | |
404 | * we need to check the common ioctls here first. | |
405 | * Just handle them with the standard handlers below. | |
406 | */ | |
407 | switch (cmd) { | |
408 | case FIOCLEX: | |
409 | case FIONCLEX: | |
410 | case FIONBIO: | |
411 | case FIOASYNC: | |
412 | case FIOQSIZE: | |
413 | break; | |
414 | ||
415 | case FIBMAP: | |
416 | case FIGETBSZ: | |
417 | case FIONREAD: | |
418 | if (S_ISREG(filp->f_dentry->d_inode->i_mode)) | |
419 | break; | |
420 | /*FALL THROUGH*/ | |
421 | ||
422 | default: | |
423 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
424 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
425 | if (error != -ENOIOCTLCMD) | |
426 | goto out_fput; | |
427 | } | |
428 | ||
429 | if (!filp->f_op || | |
430 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
431 | goto do_ioctl; | |
432 | break; | |
433 | } | |
434 | ||
1da177e4 LT |
435 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
436 | if (t->cmd == cmd) | |
437 | goto found_handler; | |
438 | } | |
1da177e4 LT |
439 | |
440 | if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && | |
441 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
442 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
443 | } else { | |
444 | static int count; | |
445 | ||
446 | if (++count <= 50) | |
447 | compat_ioctl_error(filp, fd, cmd, arg); | |
448 | error = -EINVAL; | |
449 | } | |
450 | ||
451 | goto out_fput; | |
452 | ||
453 | found_handler: | |
454 | if (t->handler) { | |
455 | lock_kernel(); | |
456 | error = t->handler(fd, cmd, arg, filp); | |
457 | unlock_kernel(); | |
1da177e4 LT |
458 | goto out_fput; |
459 | } | |
460 | ||
1da177e4 LT |
461 | do_ioctl: |
462 | error = vfs_ioctl(filp, fd, cmd, arg); | |
463 | out_fput: | |
464 | fput_light(filp, fput_needed); | |
465 | out: | |
466 | return error; | |
467 | } | |
468 | ||
469 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
470 | { | |
471 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
472 | __get_user(kfl->l_type, &ufl->l_type) || | |
473 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
474 | __get_user(kfl->l_start, &ufl->l_start) || | |
475 | __get_user(kfl->l_len, &ufl->l_len) || | |
476 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
477 | return -EFAULT; | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
482 | { | |
483 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
484 | __put_user(kfl->l_type, &ufl->l_type) || | |
485 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
486 | __put_user(kfl->l_start, &ufl->l_start) || | |
487 | __put_user(kfl->l_len, &ufl->l_len) || | |
488 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
489 | return -EFAULT; | |
490 | return 0; | |
491 | } | |
492 | ||
493 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
494 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
495 | { | |
496 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
497 | __get_user(kfl->l_type, &ufl->l_type) || | |
498 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
499 | __get_user(kfl->l_start, &ufl->l_start) || | |
500 | __get_user(kfl->l_len, &ufl->l_len) || | |
501 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
502 | return -EFAULT; | |
503 | return 0; | |
504 | } | |
505 | #endif | |
506 | ||
507 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
508 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
509 | { | |
510 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
511 | __put_user(kfl->l_type, &ufl->l_type) || | |
512 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
513 | __put_user(kfl->l_start, &ufl->l_start) || | |
514 | __put_user(kfl->l_len, &ufl->l_len) || | |
515 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
516 | return -EFAULT; | |
517 | return 0; | |
518 | } | |
519 | #endif | |
520 | ||
521 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
522 | unsigned long arg) | |
523 | { | |
524 | mm_segment_t old_fs; | |
525 | struct flock f; | |
526 | long ret; | |
527 | ||
528 | switch (cmd) { | |
529 | case F_GETLK: | |
530 | case F_SETLK: | |
531 | case F_SETLKW: | |
532 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
533 | if (ret != 0) | |
534 | break; | |
535 | old_fs = get_fs(); | |
536 | set_fs(KERNEL_DS); | |
537 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
538 | set_fs(old_fs); | |
539 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
540 | /* GETLK was successfule and we need to return the data... |
541 | * but it needs to fit in the compat structure. | |
542 | * l_start shouldn't be too big, unless the original | |
543 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
544 | * case the app was asking for trouble, so we return | |
545 | * -EOVERFLOW in that case. | |
546 | * l_len could be too big, in which case we just truncate it, | |
547 | * and only allow the app to see that part of the conflicting | |
548 | * lock that might make sense to it anyway | |
549 | */ | |
550 | ||
551 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 552 | ret = -EOVERFLOW; |
2520f14c N |
553 | if (f.l_len > COMPAT_OFF_T_MAX) |
554 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
555 | if (ret == 0) |
556 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
557 | } | |
558 | break; | |
559 | ||
560 | case F_GETLK64: | |
561 | case F_SETLK64: | |
562 | case F_SETLKW64: | |
563 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
564 | if (ret != 0) | |
565 | break; | |
566 | old_fs = get_fs(); | |
567 | set_fs(KERNEL_DS); | |
568 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
569 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
570 | (unsigned long)&f); | |
571 | set_fs(old_fs); | |
572 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
573 | /* need to return lock information - see above for commentary */ |
574 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 575 | ret = -EOVERFLOW; |
2520f14c N |
576 | if (f.l_len > COMPAT_LOFF_T_MAX) |
577 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
578 | if (ret == 0) |
579 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
580 | } | |
581 | break; | |
582 | ||
583 | default: | |
584 | ret = sys_fcntl(fd, cmd, arg); | |
585 | break; | |
586 | } | |
587 | return ret; | |
588 | } | |
589 | ||
590 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
591 | unsigned long arg) | |
592 | { | |
593 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
594 | return -EINVAL; | |
595 | return compat_sys_fcntl64(fd, cmd, arg); | |
596 | } | |
597 | ||
598 | asmlinkage long | |
599 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
600 | { | |
601 | long ret; | |
602 | aio_context_t ctx64; | |
603 | ||
604 | mm_segment_t oldfs = get_fs(); | |
605 | if (unlikely(get_user(ctx64, ctx32p))) | |
606 | return -EFAULT; | |
607 | ||
608 | set_fs(KERNEL_DS); | |
609 | /* The __user pointer cast is valid because of the set_fs() */ | |
610 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
611 | set_fs(oldfs); | |
612 | /* truncating is ok because it's a user address */ | |
613 | if (!ret) | |
614 | ret = put_user((u32) ctx64, ctx32p); | |
615 | return ret; | |
616 | } | |
617 | ||
618 | asmlinkage long | |
619 | compat_sys_io_getevents(aio_context_t ctx_id, | |
620 | unsigned long min_nr, | |
621 | unsigned long nr, | |
622 | struct io_event __user *events, | |
623 | struct compat_timespec __user *timeout) | |
624 | { | |
625 | long ret; | |
626 | struct timespec t; | |
627 | struct timespec __user *ut = NULL; | |
628 | ||
629 | ret = -EFAULT; | |
630 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
631 | nr * sizeof(struct io_event)))) | |
632 | goto out; | |
633 | if (timeout) { | |
634 | if (get_compat_timespec(&t, timeout)) | |
635 | goto out; | |
636 | ||
637 | ut = compat_alloc_user_space(sizeof(*ut)); | |
638 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
639 | goto out; | |
640 | } | |
641 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
642 | out: | |
643 | return ret; | |
644 | } | |
645 | ||
646 | static inline long | |
647 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
648 | { | |
649 | compat_uptr_t uptr; | |
650 | int i; | |
651 | ||
652 | for (i = 0; i < nr; ++i) { | |
653 | if (get_user(uptr, ptr32 + i)) | |
654 | return -EFAULT; | |
655 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
656 | return -EFAULT; | |
657 | } | |
658 | return 0; | |
659 | } | |
660 | ||
661 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
662 | ||
663 | asmlinkage long | |
664 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
665 | { | |
666 | struct iocb __user * __user *iocb64; | |
667 | long ret; | |
668 | ||
669 | if (unlikely(nr < 0)) | |
670 | return -EINVAL; | |
671 | ||
672 | if (nr > MAX_AIO_SUBMITS) | |
673 | nr = MAX_AIO_SUBMITS; | |
674 | ||
675 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
676 | ret = copy_iocb(nr, iocb, iocb64); | |
677 | if (!ret) | |
678 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
679 | return ret; | |
680 | } | |
681 | ||
682 | struct compat_ncp_mount_data { | |
683 | compat_int_t version; | |
684 | compat_uint_t ncp_fd; | |
202e5979 | 685 | __compat_uid_t mounted_uid; |
1da177e4 LT |
686 | compat_pid_t wdog_pid; |
687 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
688 | compat_uint_t time_out; | |
689 | compat_uint_t retry_count; | |
690 | compat_uint_t flags; | |
202e5979 SR |
691 | __compat_uid_t uid; |
692 | __compat_gid_t gid; | |
1da177e4 LT |
693 | compat_mode_t file_mode; |
694 | compat_mode_t dir_mode; | |
695 | }; | |
696 | ||
697 | struct compat_ncp_mount_data_v4 { | |
698 | compat_int_t version; | |
699 | compat_ulong_t flags; | |
700 | compat_ulong_t mounted_uid; | |
701 | compat_long_t wdog_pid; | |
702 | compat_uint_t ncp_fd; | |
703 | compat_uint_t time_out; | |
704 | compat_uint_t retry_count; | |
705 | compat_ulong_t uid; | |
706 | compat_ulong_t gid; | |
707 | compat_ulong_t file_mode; | |
708 | compat_ulong_t dir_mode; | |
709 | }; | |
710 | ||
711 | static void *do_ncp_super_data_conv(void *raw_data) | |
712 | { | |
713 | int version = *(unsigned int *)raw_data; | |
714 | ||
715 | if (version == 3) { | |
716 | struct compat_ncp_mount_data *c_n = raw_data; | |
717 | struct ncp_mount_data *n = raw_data; | |
718 | ||
719 | n->dir_mode = c_n->dir_mode; | |
720 | n->file_mode = c_n->file_mode; | |
721 | n->gid = c_n->gid; | |
722 | n->uid = c_n->uid; | |
723 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
724 | n->wdog_pid = c_n->wdog_pid; | |
725 | n->mounted_uid = c_n->mounted_uid; | |
726 | } else if (version == 4) { | |
727 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
728 | struct ncp_mount_data_v4 *n = raw_data; | |
729 | ||
730 | n->dir_mode = c_n->dir_mode; | |
731 | n->file_mode = c_n->file_mode; | |
732 | n->gid = c_n->gid; | |
733 | n->uid = c_n->uid; | |
734 | n->retry_count = c_n->retry_count; | |
735 | n->time_out = c_n->time_out; | |
736 | n->ncp_fd = c_n->ncp_fd; | |
737 | n->wdog_pid = c_n->wdog_pid; | |
738 | n->mounted_uid = c_n->mounted_uid; | |
739 | n->flags = c_n->flags; | |
740 | } else if (version != 5) { | |
741 | return NULL; | |
742 | } | |
743 | ||
744 | return raw_data; | |
745 | } | |
746 | ||
747 | struct compat_smb_mount_data { | |
748 | compat_int_t version; | |
202e5979 SR |
749 | __compat_uid_t mounted_uid; |
750 | __compat_uid_t uid; | |
751 | __compat_gid_t gid; | |
1da177e4 LT |
752 | compat_mode_t file_mode; |
753 | compat_mode_t dir_mode; | |
754 | }; | |
755 | ||
756 | static void *do_smb_super_data_conv(void *raw_data) | |
757 | { | |
758 | struct smb_mount_data *s = raw_data; | |
759 | struct compat_smb_mount_data *c_s = raw_data; | |
760 | ||
761 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
762 | goto out; | |
763 | s->dir_mode = c_s->dir_mode; | |
764 | s->file_mode = c_s->file_mode; | |
765 | s->gid = c_s->gid; | |
766 | s->uid = c_s->uid; | |
767 | s->mounted_uid = c_s->mounted_uid; | |
768 | out: | |
769 | return raw_data; | |
770 | } | |
771 | ||
9a9947bf DH |
772 | struct compat_nfs_string { |
773 | compat_uint_t len; | |
5fc3e624 | 774 | compat_uptr_t data; |
9a9947bf DH |
775 | }; |
776 | ||
777 | static inline void compat_nfs_string(struct nfs_string *dst, | |
778 | struct compat_nfs_string *src) | |
779 | { | |
780 | dst->data = compat_ptr(src->data); | |
781 | dst->len = src->len; | |
782 | } | |
783 | ||
784 | struct compat_nfs4_mount_data_v1 { | |
785 | compat_int_t version; | |
786 | compat_int_t flags; | |
787 | compat_int_t rsize; | |
788 | compat_int_t wsize; | |
789 | compat_int_t timeo; | |
790 | compat_int_t retrans; | |
791 | compat_int_t acregmin; | |
792 | compat_int_t acregmax; | |
793 | compat_int_t acdirmin; | |
794 | compat_int_t acdirmax; | |
795 | struct compat_nfs_string client_addr; | |
796 | struct compat_nfs_string mnt_path; | |
797 | struct compat_nfs_string hostname; | |
798 | compat_uint_t host_addrlen; | |
5fc3e624 | 799 | compat_uptr_t host_addr; |
9a9947bf DH |
800 | compat_int_t proto; |
801 | compat_int_t auth_flavourlen; | |
5fc3e624 | 802 | compat_uptr_t auth_flavours; |
9a9947bf DH |
803 | }; |
804 | ||
805 | static int do_nfs4_super_data_conv(void *raw_data) | |
806 | { | |
807 | int version = *(compat_uint_t *) raw_data; | |
808 | ||
809 | if (version == 1) { | |
810 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
811 | struct nfs4_mount_data *real = raw_data; | |
812 | ||
813 | /* copy the fields backwards */ | |
814 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
815 | real->auth_flavourlen = raw->auth_flavourlen; | |
816 | real->proto = raw->proto; | |
817 | real->host_addr = compat_ptr(raw->host_addr); | |
818 | real->host_addrlen = raw->host_addrlen; | |
819 | compat_nfs_string(&real->hostname, &raw->hostname); | |
820 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
821 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
822 | real->acdirmax = raw->acdirmax; | |
823 | real->acdirmin = raw->acdirmin; | |
824 | real->acregmax = raw->acregmax; | |
825 | real->acregmin = raw->acregmin; | |
826 | real->retrans = raw->retrans; | |
827 | real->timeo = raw->timeo; | |
828 | real->wsize = raw->wsize; | |
829 | real->rsize = raw->rsize; | |
830 | real->flags = raw->flags; | |
831 | real->version = raw->version; | |
832 | } | |
833 | else { | |
834 | return -EINVAL; | |
835 | } | |
836 | ||
837 | return 0; | |
838 | } | |
839 | ||
1da177e4 LT |
840 | #define SMBFS_NAME "smbfs" |
841 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 842 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
843 | |
844 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
845 | char __user * type, unsigned long flags, | |
846 | void __user * data) | |
847 | { | |
848 | unsigned long type_page; | |
849 | unsigned long data_page; | |
850 | unsigned long dev_page; | |
851 | char *dir_page; | |
852 | int retval; | |
853 | ||
854 | retval = copy_mount_options (type, &type_page); | |
855 | if (retval < 0) | |
856 | goto out; | |
857 | ||
858 | dir_page = getname(dir_name); | |
859 | retval = PTR_ERR(dir_page); | |
860 | if (IS_ERR(dir_page)) | |
861 | goto out1; | |
862 | ||
863 | retval = copy_mount_options (dev_name, &dev_page); | |
864 | if (retval < 0) | |
865 | goto out2; | |
866 | ||
867 | retval = copy_mount_options (data, &data_page); | |
868 | if (retval < 0) | |
869 | goto out3; | |
870 | ||
871 | retval = -EINVAL; | |
872 | ||
873 | if (type_page) { | |
874 | if (!strcmp((char *)type_page, SMBFS_NAME)) { | |
875 | do_smb_super_data_conv((void *)data_page); | |
876 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
877 | do_ncp_super_data_conv((void *)data_page); | |
9a9947bf DH |
878 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
879 | if (do_nfs4_super_data_conv((void *) data_page)) | |
880 | goto out4; | |
1da177e4 LT |
881 | } |
882 | } | |
883 | ||
884 | lock_kernel(); | |
885 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
886 | flags, (void*)data_page); | |
887 | unlock_kernel(); | |
888 | ||
9a9947bf | 889 | out4: |
1da177e4 LT |
890 | free_page(data_page); |
891 | out3: | |
892 | free_page(dev_page); | |
893 | out2: | |
894 | putname(dir_page); | |
895 | out1: | |
896 | free_page(type_page); | |
897 | out: | |
898 | return retval; | |
899 | } | |
900 | ||
901 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
902 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ | |
903 | ~(sizeof(compat_long_t)-1)) | |
904 | ||
905 | struct compat_old_linux_dirent { | |
906 | compat_ulong_t d_ino; | |
907 | compat_ulong_t d_offset; | |
908 | unsigned short d_namlen; | |
909 | char d_name[1]; | |
910 | }; | |
911 | ||
912 | struct compat_readdir_callback { | |
913 | struct compat_old_linux_dirent __user *dirent; | |
914 | int result; | |
915 | }; | |
916 | ||
917 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 918 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
919 | { |
920 | struct compat_readdir_callback *buf = __buf; | |
921 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 922 | compat_ulong_t d_ino; |
1da177e4 LT |
923 | |
924 | if (buf->result) | |
925 | return -EINVAL; | |
afefdbb2 DH |
926 | d_ino = ino; |
927 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
928 | return -EOVERFLOW; | |
1da177e4 LT |
929 | buf->result++; |
930 | dirent = buf->dirent; | |
931 | if (!access_ok(VERIFY_WRITE, dirent, | |
932 | (unsigned long)(dirent->d_name + namlen + 1) - | |
933 | (unsigned long)dirent)) | |
934 | goto efault; | |
afefdbb2 | 935 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
936 | __put_user(offset, &dirent->d_offset) || |
937 | __put_user(namlen, &dirent->d_namlen) || | |
938 | __copy_to_user(dirent->d_name, name, namlen) || | |
939 | __put_user(0, dirent->d_name + namlen)) | |
940 | goto efault; | |
941 | return 0; | |
942 | efault: | |
943 | buf->result = -EFAULT; | |
944 | return -EFAULT; | |
945 | } | |
946 | ||
947 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
948 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
949 | { | |
950 | int error; | |
951 | struct file *file; | |
952 | struct compat_readdir_callback buf; | |
953 | ||
954 | error = -EBADF; | |
955 | file = fget(fd); | |
956 | if (!file) | |
957 | goto out; | |
958 | ||
959 | buf.result = 0; | |
960 | buf.dirent = dirent; | |
961 | ||
962 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
963 | if (error >= 0) | |
964 | error = buf.result; | |
965 | ||
966 | fput(file); | |
967 | out: | |
968 | return error; | |
969 | } | |
970 | ||
971 | struct compat_linux_dirent { | |
972 | compat_ulong_t d_ino; | |
973 | compat_ulong_t d_off; | |
974 | unsigned short d_reclen; | |
975 | char d_name[1]; | |
976 | }; | |
977 | ||
978 | struct compat_getdents_callback { | |
979 | struct compat_linux_dirent __user *current_dir; | |
980 | struct compat_linux_dirent __user *previous; | |
981 | int count; | |
982 | int error; | |
983 | }; | |
984 | ||
985 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 986 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
987 | { |
988 | struct compat_linux_dirent __user * dirent; | |
989 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 990 | compat_ulong_t d_ino; |
1da177e4 LT |
991 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); |
992 | ||
993 | buf->error = -EINVAL; /* only used if we fail.. */ | |
994 | if (reclen > buf->count) | |
995 | return -EINVAL; | |
afefdbb2 DH |
996 | d_ino = ino; |
997 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
998 | return -EOVERFLOW; | |
1da177e4 LT |
999 | dirent = buf->previous; |
1000 | if (dirent) { | |
1001 | if (__put_user(offset, &dirent->d_off)) | |
1002 | goto efault; | |
1003 | } | |
1004 | dirent = buf->current_dir; | |
afefdbb2 | 1005 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
1006 | goto efault; |
1007 | if (__put_user(reclen, &dirent->d_reclen)) | |
1008 | goto efault; | |
1009 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1010 | goto efault; | |
1011 | if (__put_user(0, dirent->d_name + namlen)) | |
1012 | goto efault; | |
1013 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
1014 | goto efault; | |
1015 | buf->previous = dirent; | |
1016 | dirent = (void __user *)dirent + reclen; | |
1017 | buf->current_dir = dirent; | |
1018 | buf->count -= reclen; | |
1019 | return 0; | |
1020 | efault: | |
1021 | buf->error = -EFAULT; | |
1022 | return -EFAULT; | |
1023 | } | |
1024 | ||
1025 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1026 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1027 | { | |
1028 | struct file * file; | |
1029 | struct compat_linux_dirent __user * lastdirent; | |
1030 | struct compat_getdents_callback buf; | |
1031 | int error; | |
1032 | ||
1033 | error = -EFAULT; | |
1034 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1035 | goto out; | |
1036 | ||
1037 | error = -EBADF; | |
1038 | file = fget(fd); | |
1039 | if (!file) | |
1040 | goto out; | |
1041 | ||
1042 | buf.current_dir = dirent; | |
1043 | buf.previous = NULL; | |
1044 | buf.count = count; | |
1045 | buf.error = 0; | |
1046 | ||
1047 | error = vfs_readdir(file, compat_filldir, &buf); | |
1048 | if (error < 0) | |
1049 | goto out_putf; | |
1050 | error = buf.error; | |
1051 | lastdirent = buf.previous; | |
1052 | if (lastdirent) { | |
1053 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1054 | error = -EFAULT; | |
1055 | else | |
1056 | error = count - buf.count; | |
1057 | } | |
1058 | ||
1059 | out_putf: | |
1060 | fput(file); | |
1061 | out: | |
1062 | return error; | |
1063 | } | |
1064 | ||
1065 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1066 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1067 | ||
1068 | struct compat_getdents_callback64 { | |
1069 | struct linux_dirent64 __user *current_dir; | |
1070 | struct linux_dirent64 __user *previous; | |
1071 | int count; | |
1072 | int error; | |
1073 | }; | |
1074 | ||
1075 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1076 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1077 | { |
1078 | struct linux_dirent64 __user *dirent; | |
1079 | struct compat_getdents_callback64 *buf = __buf; | |
1080 | int jj = NAME_OFFSET(dirent); | |
1081 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1082 | u64 off; | |
1083 | ||
1084 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1085 | if (reclen > buf->count) | |
1086 | return -EINVAL; | |
1087 | dirent = buf->previous; | |
1088 | ||
1089 | if (dirent) { | |
1090 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1091 | goto efault; | |
1092 | } | |
1093 | dirent = buf->current_dir; | |
1094 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1095 | goto efault; | |
1096 | off = 0; | |
1097 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1098 | goto efault; | |
1099 | if (__put_user(reclen, &dirent->d_reclen)) | |
1100 | goto efault; | |
1101 | if (__put_user(d_type, &dirent->d_type)) | |
1102 | goto efault; | |
1103 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1104 | goto efault; | |
1105 | if (__put_user(0, dirent->d_name + namlen)) | |
1106 | goto efault; | |
1107 | buf->previous = dirent; | |
1108 | dirent = (void __user *)dirent + reclen; | |
1109 | buf->current_dir = dirent; | |
1110 | buf->count -= reclen; | |
1111 | return 0; | |
1112 | efault: | |
1113 | buf->error = -EFAULT; | |
1114 | return -EFAULT; | |
1115 | } | |
1116 | ||
1117 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1118 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1119 | { | |
1120 | struct file * file; | |
1121 | struct linux_dirent64 __user * lastdirent; | |
1122 | struct compat_getdents_callback64 buf; | |
1123 | int error; | |
1124 | ||
1125 | error = -EFAULT; | |
1126 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1127 | goto out; | |
1128 | ||
1129 | error = -EBADF; | |
1130 | file = fget(fd); | |
1131 | if (!file) | |
1132 | goto out; | |
1133 | ||
1134 | buf.current_dir = dirent; | |
1135 | buf.previous = NULL; | |
1136 | buf.count = count; | |
1137 | buf.error = 0; | |
1138 | ||
1139 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1140 | if (error < 0) | |
1141 | goto out_putf; | |
1142 | error = buf.error; | |
1143 | lastdirent = buf.previous; | |
1144 | if (lastdirent) { | |
1145 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
1146 | __put_user_unaligned(d_off, &lastdirent->d_off); | |
1147 | error = count - buf.count; | |
1148 | } | |
1149 | ||
1150 | out_putf: | |
1151 | fput(file); | |
1152 | out: | |
1153 | return error; | |
1154 | } | |
1155 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1156 | ||
1157 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1158 | const struct compat_iovec __user *uvector, | |
1159 | unsigned long nr_segs, loff_t *pos) | |
1160 | { | |
1da177e4 LT |
1161 | compat_ssize_t tot_len; |
1162 | struct iovec iovstack[UIO_FASTIOV]; | |
1163 | struct iovec *iov=iovstack, *vector; | |
1164 | ssize_t ret; | |
1165 | int seg; | |
1166 | io_fn_t fn; | |
1167 | iov_fn_t fnv; | |
1168 | ||
1169 | /* | |
1170 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1171 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1172 | * traditionally returned zero for zero segments, so... | |
1173 | */ | |
1174 | ret = 0; | |
1175 | if (nr_segs == 0) | |
1176 | goto out; | |
1177 | ||
1178 | /* | |
1179 | * First get the "struct iovec" from user memory and | |
1180 | * verify all the pointers | |
1181 | */ | |
1182 | ret = -EINVAL; | |
1183 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1184 | goto out; | |
1185 | if (!file->f_op) | |
1186 | goto out; | |
1187 | if (nr_segs > UIO_FASTIOV) { | |
1188 | ret = -ENOMEM; | |
1189 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1190 | if (!iov) | |
1191 | goto out; | |
1192 | } | |
1193 | ret = -EFAULT; | |
1194 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1195 | goto out; | |
1196 | ||
1197 | /* | |
1198 | * Single unix specification: | |
1199 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1200 | * ssize_t. The total length is fitting an ssize_t | |
1201 | * | |
1202 | * Be careful here because iov_len is a size_t not an ssize_t | |
1203 | */ | |
1204 | tot_len = 0; | |
1205 | vector = iov; | |
1206 | ret = -EINVAL; | |
1207 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1208 | compat_ssize_t tmp = tot_len; | |
1209 | compat_ssize_t len; | |
1210 | compat_uptr_t buf; | |
1211 | ||
1212 | if (__get_user(len, &uvector->iov_len) || | |
1213 | __get_user(buf, &uvector->iov_base)) { | |
1214 | ret = -EFAULT; | |
1215 | goto out; | |
1216 | } | |
1217 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1218 | goto out; | |
1219 | tot_len += len; | |
1220 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1221 | goto out; | |
1222 | vector->iov_base = compat_ptr(buf); | |
1223 | vector->iov_len = (compat_size_t) len; | |
1224 | uvector++; | |
1225 | vector++; | |
1226 | } | |
1227 | if (tot_len == 0) { | |
1228 | ret = 0; | |
1229 | goto out; | |
1230 | } | |
1231 | ||
1232 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1233 | if (ret < 0) |
1da177e4 LT |
1234 | goto out; |
1235 | ||
e7edf9cd JM |
1236 | ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); |
1237 | if (ret) | |
1238 | goto out; | |
1239 | ||
1da177e4 LT |
1240 | fnv = NULL; |
1241 | if (type == READ) { | |
1242 | fn = file->f_op->read; | |
ee0b3e67 | 1243 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1244 | } else { |
1245 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1246 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1247 | } |
1248 | ||
ee0b3e67 BP |
1249 | if (fnv) |
1250 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1251 | pos, fnv); | |
1252 | else | |
1253 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1254 | |
1da177e4 LT |
1255 | out: |
1256 | if (iov != iovstack) | |
1257 | kfree(iov); | |
0eeca283 RL |
1258 | if ((ret + (type == READ)) > 0) { |
1259 | struct dentry *dentry = file->f_dentry; | |
1260 | if (type == READ) | |
1261 | fsnotify_access(dentry); | |
1262 | else | |
1263 | fsnotify_modify(dentry); | |
1264 | } | |
1da177e4 LT |
1265 | return ret; |
1266 | } | |
1267 | ||
1268 | asmlinkage ssize_t | |
1269 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1270 | { | |
1271 | struct file *file; | |
1272 | ssize_t ret = -EBADF; | |
1273 | ||
1274 | file = fget(fd); | |
1275 | if (!file) | |
1276 | return -EBADF; | |
1277 | ||
1278 | if (!(file->f_mode & FMODE_READ)) | |
1279 | goto out; | |
1280 | ||
1281 | ret = -EINVAL; | |
ee0b3e67 | 1282 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1283 | goto out; |
1284 | ||
1285 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1286 | ||
1287 | out: | |
1288 | fput(file); | |
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | asmlinkage ssize_t | |
1293 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1294 | { | |
1295 | struct file *file; | |
1296 | ssize_t ret = -EBADF; | |
1297 | ||
1298 | file = fget(fd); | |
1299 | if (!file) | |
1300 | return -EBADF; | |
1301 | if (!(file->f_mode & FMODE_WRITE)) | |
1302 | goto out; | |
1303 | ||
1304 | ret = -EINVAL; | |
ee0b3e67 | 1305 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1306 | goto out; |
1307 | ||
1308 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1309 | ||
1310 | out: | |
1311 | fput(file); | |
1312 | return ret; | |
1313 | } | |
1314 | ||
d2610202 AK |
1315 | asmlinkage long |
1316 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1317 | unsigned int nr_segs, unsigned int flags) | |
1318 | { | |
1319 | unsigned i; | |
90cbad65 | 1320 | struct iovec __user *iov; |
98232d50 | 1321 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1322 | return -EINVAL; |
1323 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1324 | for (i = 0; i < nr_segs; i++) { | |
1325 | struct compat_iovec v; | |
1326 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1327 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1328 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1329 | put_user(v.iov_len, &iov[i].iov_len)) | |
1330 | return -EFAULT; | |
1331 | } | |
1332 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1333 | } | |
1334 | ||
e922efc3 MS |
1335 | /* |
1336 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1337 | * O_LARGEFILE flag. | |
1338 | */ | |
1339 | asmlinkage long | |
1340 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1341 | { | |
5590ff0d UD |
1342 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1343 | } | |
1344 | ||
1345 | /* | |
1346 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1347 | * O_LARGEFILE flag. | |
1348 | */ | |
1349 | asmlinkage long | |
9ad11ab4 | 1350 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1351 | { |
1352 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1353 | } |
1354 | ||
1da177e4 LT |
1355 | /* |
1356 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1357 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1358 | * and envp pointers. | |
1359 | */ | |
1360 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1361 | { | |
1362 | int i = 0; | |
1363 | ||
1364 | if (argv != NULL) { | |
1365 | for (;;) { | |
1366 | compat_uptr_t p; | |
1367 | ||
1368 | if (get_user(p, argv)) | |
1369 | return -EFAULT; | |
1370 | if (!p) | |
1371 | break; | |
1372 | argv++; | |
1373 | if(++i > max) | |
1374 | return -E2BIG; | |
1375 | } | |
1376 | } | |
1377 | return i; | |
1378 | } | |
1379 | ||
1380 | /* | |
1381 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1382 | * except that it works with 32 bit argv and envp pointers. | |
1383 | */ | |
1384 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1385 | struct linux_binprm *bprm) | |
1386 | { | |
1387 | struct page *kmapped_page = NULL; | |
1388 | char *kaddr = NULL; | |
1389 | int ret; | |
1390 | ||
1391 | while (argc-- > 0) { | |
1392 | compat_uptr_t str; | |
1393 | int len; | |
1394 | unsigned long pos; | |
1395 | ||
1396 | if (get_user(str, argv+argc) || | |
1397 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1398 | ret = -EFAULT; | |
1399 | goto out; | |
1400 | } | |
1401 | ||
1402 | if (bprm->p < len) { | |
1403 | ret = -E2BIG; | |
1404 | goto out; | |
1405 | } | |
1406 | ||
1407 | bprm->p -= len; | |
1408 | /* XXX: add architecture specific overflow check here. */ | |
1409 | pos = bprm->p; | |
1410 | ||
1411 | while (len > 0) { | |
1412 | int i, new, err; | |
1413 | int offset, bytes_to_copy; | |
1414 | struct page *page; | |
1415 | ||
1416 | offset = pos % PAGE_SIZE; | |
1417 | i = pos/PAGE_SIZE; | |
1418 | page = bprm->page[i]; | |
1419 | new = 0; | |
1420 | if (!page) { | |
1421 | page = alloc_page(GFP_HIGHUSER); | |
1422 | bprm->page[i] = page; | |
1423 | if (!page) { | |
1424 | ret = -ENOMEM; | |
1425 | goto out; | |
1426 | } | |
1427 | new = 1; | |
1428 | } | |
1429 | ||
1430 | if (page != kmapped_page) { | |
1431 | if (kmapped_page) | |
1432 | kunmap(kmapped_page); | |
1433 | kmapped_page = page; | |
1434 | kaddr = kmap(kmapped_page); | |
1435 | } | |
1436 | if (new && offset) | |
1437 | memset(kaddr, 0, offset); | |
1438 | bytes_to_copy = PAGE_SIZE - offset; | |
1439 | if (bytes_to_copy > len) { | |
1440 | bytes_to_copy = len; | |
1441 | if (new) | |
1442 | memset(kaddr+offset+len, 0, | |
1443 | PAGE_SIZE-offset-len); | |
1444 | } | |
1445 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1446 | bytes_to_copy); | |
1447 | if (err) { | |
1448 | ret = -EFAULT; | |
1449 | goto out; | |
1450 | } | |
1451 | ||
1452 | pos += bytes_to_copy; | |
1453 | str += bytes_to_copy; | |
1454 | len -= bytes_to_copy; | |
1455 | } | |
1456 | } | |
1457 | ret = 0; | |
1458 | out: | |
1459 | if (kmapped_page) | |
1460 | kunmap(kmapped_page); | |
1461 | return ret; | |
1462 | } | |
1463 | ||
1464 | #ifdef CONFIG_MMU | |
1465 | ||
1466 | #define free_arg_pages(bprm) do { } while (0) | |
1467 | ||
1468 | #else | |
1469 | ||
1470 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1471 | { | |
1472 | int i; | |
1473 | ||
1474 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1475 | if (bprm->page[i]) | |
1476 | __free_page(bprm->page[i]); | |
1477 | bprm->page[i] = NULL; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | #endif /* CONFIG_MMU */ | |
1482 | ||
1483 | /* | |
1484 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1485 | * that it processes 32 bit argv and envp pointers. | |
1486 | */ | |
1487 | int compat_do_execve(char * filename, | |
1488 | compat_uptr_t __user *argv, | |
1489 | compat_uptr_t __user *envp, | |
1490 | struct pt_regs * regs) | |
1491 | { | |
1492 | struct linux_binprm *bprm; | |
1493 | struct file *file; | |
1494 | int retval; | |
1495 | int i; | |
1496 | ||
1497 | retval = -ENOMEM; | |
11b0b5ab | 1498 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 LT |
1499 | if (!bprm) |
1500 | goto out_ret; | |
1da177e4 LT |
1501 | |
1502 | file = open_exec(filename); | |
1503 | retval = PTR_ERR(file); | |
1504 | if (IS_ERR(file)) | |
1505 | goto out_kfree; | |
1506 | ||
1507 | sched_exec(); | |
1508 | ||
1509 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1510 | bprm->file = file; | |
1511 | bprm->filename = filename; | |
1512 | bprm->interp = filename; | |
1513 | bprm->mm = mm_alloc(); | |
1514 | retval = -ENOMEM; | |
1515 | if (!bprm->mm) | |
1516 | goto out_file; | |
1517 | ||
1518 | retval = init_new_context(current, bprm->mm); | |
1519 | if (retval < 0) | |
1520 | goto out_mm; | |
1521 | ||
1522 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1523 | if ((retval = bprm->argc) < 0) | |
1524 | goto out_mm; | |
1525 | ||
1526 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1527 | if ((retval = bprm->envc) < 0) | |
1528 | goto out_mm; | |
1529 | ||
1530 | retval = security_bprm_alloc(bprm); | |
1531 | if (retval) | |
1532 | goto out; | |
1533 | ||
1534 | retval = prepare_binprm(bprm); | |
1535 | if (retval < 0) | |
1536 | goto out; | |
1537 | ||
1538 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1539 | if (retval < 0) | |
1540 | goto out; | |
1541 | ||
1542 | bprm->exec = bprm->p; | |
1543 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1544 | if (retval < 0) | |
1545 | goto out; | |
1546 | ||
1547 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1548 | if (retval < 0) | |
1549 | goto out; | |
1550 | ||
1551 | retval = search_binary_handler(bprm, regs); | |
1552 | if (retval >= 0) { | |
1553 | free_arg_pages(bprm); | |
1554 | ||
1555 | /* execve success */ | |
1556 | security_bprm_free(bprm); | |
4a805e86 | 1557 | acct_update_integrals(current); |
1da177e4 LT |
1558 | kfree(bprm); |
1559 | return retval; | |
1560 | } | |
1561 | ||
1562 | out: | |
1563 | /* Something went wrong, return the inode and free the argument pages*/ | |
1564 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1565 | struct page * page = bprm->page[i]; | |
1566 | if (page) | |
1567 | __free_page(page); | |
1568 | } | |
1569 | ||
1570 | if (bprm->security) | |
1571 | security_bprm_free(bprm); | |
1572 | ||
1573 | out_mm: | |
1574 | if (bprm->mm) | |
1575 | mmdrop(bprm->mm); | |
1576 | ||
1577 | out_file: | |
1578 | if (bprm->file) { | |
1579 | allow_write_access(bprm->file); | |
1580 | fput(bprm->file); | |
1581 | } | |
1582 | ||
1583 | out_kfree: | |
1584 | kfree(bprm); | |
1585 | ||
1586 | out_ret: | |
1587 | return retval; | |
1588 | } | |
1589 | ||
1590 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1591 | ||
1592 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1593 | ||
1594 | /* | |
1595 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1596 | * 64-bit unsigned longs. | |
1597 | */ | |
858119e1 | 1598 | static |
1da177e4 LT |
1599 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1600 | unsigned long *fdset) | |
1601 | { | |
1602 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1603 | if (ufdset) { | |
1604 | unsigned long odd; | |
1605 | ||
1606 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1607 | return -EFAULT; | |
1608 | ||
1609 | odd = nr & 1UL; | |
1610 | nr &= ~1UL; | |
1611 | while (nr) { | |
1612 | unsigned long h, l; | |
1613 | __get_user(l, ufdset); | |
1614 | __get_user(h, ufdset+1); | |
1615 | ufdset += 2; | |
1616 | *fdset++ = h << 32 | l; | |
1617 | nr -= 2; | |
1618 | } | |
1619 | if (odd) | |
1620 | __get_user(*fdset, ufdset); | |
1621 | } else { | |
1622 | /* Tricky, must clear full unsigned long in the | |
1623 | * kernel fdset at the end, this makes sure that | |
1624 | * actually happens. | |
1625 | */ | |
1626 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1627 | } | |
1628 | return 0; | |
1629 | } | |
1630 | ||
858119e1 | 1631 | static |
1da177e4 LT |
1632 | void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1633 | unsigned long *fdset) | |
1634 | { | |
1635 | unsigned long odd; | |
1636 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1637 | ||
1638 | if (!ufdset) | |
1639 | return; | |
1640 | ||
1641 | odd = nr & 1UL; | |
1642 | nr &= ~1UL; | |
1643 | while (nr) { | |
1644 | unsigned long h, l; | |
1645 | l = *fdset++; | |
1646 | h = l >> 32; | |
1647 | __put_user(l, ufdset); | |
1648 | __put_user(h, ufdset+1); | |
1649 | ufdset += 2; | |
1650 | nr -= 2; | |
1651 | } | |
1652 | if (odd) | |
1653 | __put_user(*fdset, ufdset); | |
1654 | } | |
1655 | ||
1656 | ||
1657 | /* | |
1658 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1659 | * should be compared to it from time to time | |
1660 | */ | |
1da177e4 LT |
1661 | |
1662 | /* | |
1663 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1664 | * like to be certain this leads to no problems. So I return | |
1665 | * EINTR just for safety. | |
1666 | * | |
1667 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1668 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1669 | */ | |
1670 | #define MAX_SELECT_SECONDS \ | |
1671 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1672 | ||
9f72949f DW |
1673 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1674 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) | |
1da177e4 LT |
1675 | { |
1676 | fd_set_bits fds; | |
1677 | char *bits; | |
1da177e4 | 1678 | int size, max_fdset, ret = -EINVAL; |
a4531edd | 1679 | struct fdtable *fdt; |
1da177e4 | 1680 | |
1da177e4 LT |
1681 | if (n < 0) |
1682 | goto out_nofds; | |
1683 | ||
1684 | /* max_fdset can increase, so grab it once to avoid race */ | |
ac5b8b6f | 1685 | rcu_read_lock(); |
a4531edd LT |
1686 | fdt = files_fdtable(current->files); |
1687 | max_fdset = fdt->max_fdset; | |
ac5b8b6f | 1688 | rcu_read_unlock(); |
1da177e4 LT |
1689 | if (n > max_fdset) |
1690 | n = max_fdset; | |
1691 | ||
1692 | /* | |
1693 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1694 | * since we used fdset we need to allocate memory in units of | |
1695 | * long-words. | |
1696 | */ | |
1697 | ret = -ENOMEM; | |
1698 | size = FDS_BYTES(n); | |
68c3431a | 1699 | bits = kmalloc(6 * size, GFP_KERNEL); |
1da177e4 LT |
1700 | if (!bits) |
1701 | goto out_nofds; | |
1702 | fds.in = (unsigned long *) bits; | |
1703 | fds.out = (unsigned long *) (bits + size); | |
1704 | fds.ex = (unsigned long *) (bits + 2*size); | |
1705 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1706 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1707 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1708 | ||
1709 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1710 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1711 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1712 | goto out; | |
1713 | zero_fd_set(n, fds.res_in); | |
1714 | zero_fd_set(n, fds.res_out); | |
1715 | zero_fd_set(n, fds.res_ex); | |
1716 | ||
9f72949f | 1717 | ret = do_select(n, &fds, timeout); |
1da177e4 LT |
1718 | |
1719 | if (ret < 0) | |
1720 | goto out; | |
1721 | if (!ret) { | |
1722 | ret = -ERESTARTNOHAND; | |
1723 | if (signal_pending(current)) | |
1724 | goto out; | |
1725 | ret = 0; | |
1726 | } | |
1727 | ||
1728 | compat_set_fd_set(n, inp, fds.res_in); | |
1729 | compat_set_fd_set(n, outp, fds.res_out); | |
1730 | compat_set_fd_set(n, exp, fds.res_ex); | |
1731 | ||
1732 | out: | |
68c3431a | 1733 | kfree(bits); |
1da177e4 LT |
1734 | out_nofds: |
1735 | return ret; | |
1736 | } | |
1737 | ||
9f72949f DW |
1738 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1739 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1740 | struct compat_timeval __user *tvp) | |
1741 | { | |
1742 | s64 timeout = -1; | |
1743 | struct compat_timeval tv; | |
1744 | int ret; | |
1745 | ||
1746 | if (tvp) { | |
1747 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1748 | return -EFAULT; | |
1749 | ||
1750 | if (tv.tv_sec < 0 || tv.tv_usec < 0) | |
1751 | return -EINVAL; | |
1752 | ||
1753 | /* Cast to u64 to make GCC stop complaining */ | |
1754 | if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) | |
1755 | timeout = -1; /* infinite */ | |
1756 | else { | |
7e732bfc | 1757 | timeout = ROUND_UP(tv.tv_usec, 1000000/HZ); |
9f72949f DW |
1758 | timeout += tv.tv_sec * HZ; |
1759 | } | |
1760 | } | |
1761 | ||
1762 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1763 | ||
1764 | if (tvp) { | |
643a6545 AM |
1765 | struct compat_timeval rtv; |
1766 | ||
9f72949f DW |
1767 | if (current->personality & STICKY_TIMEOUTS) |
1768 | goto sticky; | |
643a6545 AM |
1769 | rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)); |
1770 | rtv.tv_sec = timeout; | |
74910e6c | 1771 | if (compat_timeval_compare(&rtv, &tv) >= 0) |
643a6545 AM |
1772 | rtv = tv; |
1773 | if (copy_to_user(tvp, &rtv, sizeof(rtv))) { | |
9f72949f DW |
1774 | sticky: |
1775 | /* | |
1776 | * If an application puts its timeval in read-only | |
1777 | * memory, we don't want the Linux-specific update to | |
1778 | * the timeval to cause a fault after the select has | |
1779 | * completed successfully. However, because we're not | |
1780 | * updating the timeval, we can't restart the system | |
1781 | * call. | |
1782 | */ | |
1783 | if (ret == -ERESTARTNOHAND) | |
1784 | ret = -EINTR; | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | return ret; | |
1789 | } | |
1790 | ||
1791 | #ifdef TIF_RESTORE_SIGMASK | |
1792 | asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, | |
1793 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1794 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1795 | compat_size_t sigsetsize) | |
1796 | { | |
1797 | compat_sigset_t ss32; | |
1798 | sigset_t ksigmask, sigsaved; | |
cb82a6cd | 1799 | s64 timeout = MAX_SCHEDULE_TIMEOUT; |
9f72949f DW |
1800 | struct compat_timespec ts; |
1801 | int ret; | |
1802 | ||
1803 | if (tsp) { | |
1804 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1805 | return -EFAULT; | |
1806 | ||
1807 | if (ts.tv_sec < 0 || ts.tv_nsec < 0) | |
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
1811 | if (sigmask) { | |
1812 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1813 | return -EINVAL; | |
1814 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1815 | return -EFAULT; | |
1816 | sigset_from_compat(&ksigmask, &ss32); | |
1817 | ||
1818 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1819 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1820 | } | |
1821 | ||
1822 | do { | |
1823 | if (tsp) { | |
1824 | if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { | |
1825 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); | |
1826 | timeout += ts.tv_sec * (unsigned long)HZ; | |
1827 | ts.tv_sec = 0; | |
1828 | ts.tv_nsec = 0; | |
1829 | } else { | |
1830 | ts.tv_sec -= MAX_SELECT_SECONDS; | |
1831 | timeout = MAX_SELECT_SECONDS * HZ; | |
1832 | } | |
1833 | } | |
1834 | ||
1835 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1836 | ||
1837 | } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec)); | |
1838 | ||
87c2b7c0 | 1839 | if (tsp) { |
643a6545 AM |
1840 | struct compat_timespec rts; |
1841 | ||
87c2b7c0 HC |
1842 | if (current->personality & STICKY_TIMEOUTS) |
1843 | goto sticky; | |
1844 | ||
643a6545 AM |
1845 | rts.tv_sec = timeout / HZ; |
1846 | rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ); | |
1847 | if (rts.tv_nsec >= NSEC_PER_SEC) { | |
1848 | rts.tv_sec++; | |
1849 | rts.tv_nsec -= NSEC_PER_SEC; | |
9f72949f | 1850 | } |
74910e6c | 1851 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 | 1852 | rts = ts; |
87c2b7c0 HC |
1853 | if (copy_to_user(tsp, &rts, sizeof(rts))) { |
1854 | sticky: | |
1855 | /* | |
1856 | * If an application puts its timeval in read-only | |
1857 | * memory, we don't want the Linux-specific update to | |
1858 | * the timeval to cause a fault after the select has | |
1859 | * completed successfully. However, because we're not | |
1860 | * updating the timeval, we can't restart the system | |
1861 | * call. | |
1862 | */ | |
1863 | if (ret == -ERESTARTNOHAND) | |
1864 | ret = -EINTR; | |
1865 | } | |
9f72949f DW |
1866 | } |
1867 | ||
1868 | if (ret == -ERESTARTNOHAND) { | |
1869 | /* | |
1870 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1871 | * the signal on the way back to userspace, before the signal | |
1872 | * mask is restored. | |
1873 | */ | |
1874 | if (sigmask) { | |
1875 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1876 | sizeof(sigsaved)); | |
1877 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1878 | } | |
1879 | } else if (sigmask) | |
1880 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1881 | ||
1882 | return ret; | |
1883 | } | |
1884 | ||
1885 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1886 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1887 | struct compat_timespec __user *tsp, void __user *sig) | |
1888 | { | |
1889 | compat_size_t sigsetsize = 0; | |
1890 | compat_uptr_t up = 0; | |
1891 | ||
1892 | if (sig) { | |
1893 | if (!access_ok(VERIFY_READ, sig, | |
1894 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1895 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1896 | __get_user(sigsetsize, | |
1897 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1898 | return -EFAULT; | |
1899 | } | |
1900 | return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up), | |
1901 | sigsetsize); | |
1902 | } | |
1903 | ||
1904 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1905 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1906 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1907 | { | |
1908 | compat_sigset_t ss32; | |
1909 | sigset_t ksigmask, sigsaved; | |
1910 | struct compat_timespec ts; | |
1911 | s64 timeout = -1; | |
1912 | int ret; | |
1913 | ||
1914 | if (tsp) { | |
1915 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1916 | return -EFAULT; | |
1917 | ||
1918 | /* We assume that ts.tv_sec is always lower than | |
1919 | the number of seconds that can be expressed in | |
1920 | an s64. Otherwise the compiler bitches at us */ | |
7e732bfc | 1921 | timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1922 | timeout += ts.tv_sec * HZ; |
1923 | } | |
1924 | ||
1925 | if (sigmask) { | |
3835a9bd | 1926 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1927 | return -EINVAL; |
1928 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1929 | return -EFAULT; | |
1930 | sigset_from_compat(&ksigmask, &ss32); | |
1931 | ||
1932 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1933 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1934 | } | |
1935 | ||
1936 | ret = do_sys_poll(ufds, nfds, &timeout); | |
1937 | ||
1938 | /* We can restart this syscall, usually */ | |
1939 | if (ret == -EINTR) { | |
1940 | /* | |
1941 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1942 | * the signal on the way back to userspace, before the signal | |
1943 | * mask is restored. | |
1944 | */ | |
1945 | if (sigmask) { | |
1946 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1947 | sizeof(sigsaved)); | |
1948 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1949 | } | |
1950 | ret = -ERESTARTNOHAND; | |
1951 | } else if (sigmask) | |
1952 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1953 | ||
1954 | if (tsp && timeout >= 0) { | |
643a6545 AM |
1955 | struct compat_timespec rts; |
1956 | ||
9f72949f DW |
1957 | if (current->personality & STICKY_TIMEOUTS) |
1958 | goto sticky; | |
1959 | /* Yes, we know it's actually an s64, but it's also positive. */ | |
643a6545 AM |
1960 | rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) * |
1961 | 1000; | |
1962 | rts.tv_sec = timeout; | |
74910e6c | 1963 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1964 | rts = ts; |
1965 | if (copy_to_user(tsp, &rts, sizeof(rts))) { | |
9f72949f DW |
1966 | sticky: |
1967 | /* | |
1968 | * If an application puts its timeval in read-only | |
1969 | * memory, we don't want the Linux-specific update to | |
1970 | * the timeval to cause a fault after the select has | |
1971 | * completed successfully. However, because we're not | |
1972 | * updating the timeval, we can't restart the system | |
1973 | * call. | |
1974 | */ | |
1975 | if (ret == -ERESTARTNOHAND && timeout >= 0) | |
1976 | ret = -EINTR; | |
1977 | } | |
1978 | } | |
1979 | ||
1980 | return ret; | |
1981 | } | |
1982 | #endif /* TIF_RESTORE_SIGMASK */ | |
1983 | ||
1da177e4 LT |
1984 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1985 | /* Stuff for NFS server syscalls... */ | |
1986 | struct compat_nfsctl_svc { | |
1987 | u16 svc32_port; | |
1988 | s32 svc32_nthreads; | |
1989 | }; | |
1990 | ||
1991 | struct compat_nfsctl_client { | |
1992 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1993 | s32 cl32_naddr; | |
1994 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1995 | s32 cl32_fhkeytype; | |
1996 | s32 cl32_fhkeylen; | |
1997 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1998 | }; | |
1999 | ||
2000 | struct compat_nfsctl_export { | |
2001 | char ex32_client[NFSCLNT_IDMAX+1]; | |
2002 | char ex32_path[NFS_MAXPATHLEN+1]; | |
2003 | compat_dev_t ex32_dev; | |
2004 | compat_ino_t ex32_ino; | |
2005 | compat_int_t ex32_flags; | |
202e5979 SR |
2006 | __compat_uid_t ex32_anon_uid; |
2007 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
2008 | }; |
2009 | ||
2010 | struct compat_nfsctl_fdparm { | |
2011 | struct sockaddr gd32_addr; | |
2012 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2013 | compat_int_t gd32_version; | |
2014 | }; | |
2015 | ||
2016 | struct compat_nfsctl_fsparm { | |
2017 | struct sockaddr gd32_addr; | |
2018 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2019 | compat_int_t gd32_maxlen; | |
2020 | }; | |
2021 | ||
2022 | struct compat_nfsctl_arg { | |
2023 | compat_int_t ca32_version; /* safeguard */ | |
2024 | union { | |
2025 | struct compat_nfsctl_svc u32_svc; | |
2026 | struct compat_nfsctl_client u32_client; | |
2027 | struct compat_nfsctl_export u32_export; | |
2028 | struct compat_nfsctl_fdparm u32_getfd; | |
2029 | struct compat_nfsctl_fsparm u32_getfs; | |
2030 | } u; | |
2031 | #define ca32_svc u.u32_svc | |
2032 | #define ca32_client u.u32_client | |
2033 | #define ca32_export u.u32_export | |
2034 | #define ca32_getfd u.u32_getfd | |
2035 | #define ca32_getfs u.u32_getfs | |
2036 | }; | |
2037 | ||
2038 | union compat_nfsctl_res { | |
2039 | __u8 cr32_getfh[NFS_FHSIZE]; | |
2040 | struct knfsd_fh cr32_getfs; | |
2041 | }; | |
2042 | ||
d64b1c87 LFS |
2043 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
2044 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2045 | { |
d64b1c87 LFS |
2046 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2047 | get_user(karg->ca_version, &arg->ca32_version) || | |
2048 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2049 | __get_user(karg->ca_svc.svc_nthreads, | |
2050 | &arg->ca32_svc.svc32_nthreads)) | |
2051 | return -EFAULT; | |
2052 | return 0; | |
1da177e4 LT |
2053 | } |
2054 | ||
d64b1c87 LFS |
2055 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2056 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2057 | { |
d64b1c87 LFS |
2058 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2059 | sizeof(arg->ca32_client)) || | |
2060 | get_user(karg->ca_version, &arg->ca32_version) || | |
2061 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2062 | &arg->ca32_client.cl32_ident[0], | |
2063 | NFSCLNT_IDMAX) || | |
2064 | __get_user(karg->ca_client.cl_naddr, | |
2065 | &arg->ca32_client.cl32_naddr) || | |
2066 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2067 | &arg->ca32_client.cl32_addrlist[0], | |
2068 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2069 | __get_user(karg->ca_client.cl_fhkeytype, | |
2070 | &arg->ca32_client.cl32_fhkeytype) || | |
2071 | __get_user(karg->ca_client.cl_fhkeylen, | |
2072 | &arg->ca32_client.cl32_fhkeylen) || | |
2073 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2074 | &arg->ca32_client.cl32_fhkey[0], | |
2075 | NFSCLNT_KEYMAX)) | |
2076 | return -EFAULT; | |
1da177e4 | 2077 | |
d64b1c87 | 2078 | return 0; |
1da177e4 LT |
2079 | } |
2080 | ||
d64b1c87 LFS |
2081 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2082 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2083 | { |
d64b1c87 LFS |
2084 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2085 | sizeof(arg->ca32_export)) || | |
2086 | get_user(karg->ca_version, &arg->ca32_version) || | |
2087 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2088 | &arg->ca32_export.ex32_client[0], | |
2089 | NFSCLNT_IDMAX) || | |
2090 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2091 | &arg->ca32_export.ex32_path[0], | |
2092 | NFS_MAXPATHLEN) || | |
2093 | __get_user(karg->ca_export.ex_dev, | |
2094 | &arg->ca32_export.ex32_dev) || | |
2095 | __get_user(karg->ca_export.ex_ino, | |
2096 | &arg->ca32_export.ex32_ino) || | |
2097 | __get_user(karg->ca_export.ex_flags, | |
2098 | &arg->ca32_export.ex32_flags) || | |
2099 | __get_user(karg->ca_export.ex_anon_uid, | |
2100 | &arg->ca32_export.ex32_anon_uid) || | |
2101 | __get_user(karg->ca_export.ex_anon_gid, | |
2102 | &arg->ca32_export.ex32_anon_gid)) | |
2103 | return -EFAULT; | |
1da177e4 LT |
2104 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2105 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2106 | ||
d64b1c87 | 2107 | return 0; |
1da177e4 LT |
2108 | } |
2109 | ||
d64b1c87 LFS |
2110 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2111 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2112 | { |
d64b1c87 LFS |
2113 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2114 | sizeof(arg->ca32_getfd)) || | |
2115 | get_user(karg->ca_version, &arg->ca32_version) || | |
2116 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2117 | &arg->ca32_getfd.gd32_addr, | |
2118 | (sizeof(struct sockaddr))) || | |
2119 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2120 | &arg->ca32_getfd.gd32_path, | |
2121 | (NFS_MAXPATHLEN+1)) || | |
2122 | __get_user(karg->ca_getfd.gd_version, | |
2123 | &arg->ca32_getfd.gd32_version)) | |
2124 | return -EFAULT; | |
1da177e4 | 2125 | |
d64b1c87 | 2126 | return 0; |
1da177e4 LT |
2127 | } |
2128 | ||
d64b1c87 LFS |
2129 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2130 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2131 | { |
d64b1c87 LFS |
2132 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2133 | get_user(karg->ca_version, &arg->ca32_version) || | |
2134 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2135 | &arg->ca32_getfs.gd32_addr, | |
2136 | (sizeof(struct sockaddr))) || | |
2137 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2138 | &arg->ca32_getfs.gd32_path, | |
2139 | (NFS_MAXPATHLEN+1)) || | |
2140 | __get_user(karg->ca_getfs.gd_maxlen, | |
2141 | &arg->ca32_getfs.gd32_maxlen)) | |
2142 | return -EFAULT; | |
1da177e4 | 2143 | |
d64b1c87 | 2144 | return 0; |
1da177e4 LT |
2145 | } |
2146 | ||
2147 | /* This really doesn't need translations, we are only passing | |
2148 | * back a union which contains opaque nfs file handle data. | |
2149 | */ | |
d64b1c87 LFS |
2150 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2151 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2152 | { |
2153 | int err; | |
2154 | ||
2155 | err = copy_to_user(res, kres, sizeof(*res)); | |
2156 | ||
2157 | return (err) ? -EFAULT : 0; | |
2158 | } | |
2159 | ||
d64b1c87 LFS |
2160 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2161 | struct compat_nfsctl_arg __user *arg, | |
2162 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2163 | { |
2164 | struct nfsctl_arg *karg; | |
2165 | union nfsctl_res *kres; | |
2166 | mm_segment_t oldfs; | |
2167 | int err; | |
2168 | ||
2169 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2170 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2171 | if(!karg || !kres) { | |
2172 | err = -ENOMEM; | |
2173 | goto done; | |
2174 | } | |
2175 | ||
2176 | switch(cmd) { | |
2177 | case NFSCTL_SVC: | |
2178 | err = compat_nfs_svc_trans(karg, arg); | |
2179 | break; | |
2180 | ||
2181 | case NFSCTL_ADDCLIENT: | |
2182 | err = compat_nfs_clnt_trans(karg, arg); | |
2183 | break; | |
2184 | ||
2185 | case NFSCTL_DELCLIENT: | |
2186 | err = compat_nfs_clnt_trans(karg, arg); | |
2187 | break; | |
2188 | ||
2189 | case NFSCTL_EXPORT: | |
2190 | case NFSCTL_UNEXPORT: | |
2191 | err = compat_nfs_exp_trans(karg, arg); | |
2192 | break; | |
2193 | ||
2194 | case NFSCTL_GETFD: | |
2195 | err = compat_nfs_getfd_trans(karg, arg); | |
2196 | break; | |
2197 | ||
2198 | case NFSCTL_GETFS: | |
2199 | err = compat_nfs_getfs_trans(karg, arg); | |
2200 | break; | |
2201 | ||
2202 | default: | |
2203 | err = -EINVAL; | |
57070d01 | 2204 | break; |
1da177e4 LT |
2205 | } |
2206 | ||
57070d01 PS |
2207 | if (err) |
2208 | goto done; | |
2209 | ||
1da177e4 LT |
2210 | oldfs = get_fs(); |
2211 | set_fs(KERNEL_DS); | |
2212 | /* The __user pointer casts are valid because of the set_fs() */ | |
2213 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2214 | set_fs(oldfs); | |
2215 | ||
2216 | if (err) | |
2217 | goto done; | |
2218 | ||
2219 | if((cmd == NFSCTL_GETFD) || | |
2220 | (cmd == NFSCTL_GETFS)) | |
2221 | err = compat_nfs_getfh_res_trans(kres, res); | |
2222 | ||
2223 | done: | |
2224 | kfree(karg); | |
2225 | kfree(kres); | |
2226 | return err; | |
2227 | } | |
2228 | #else /* !NFSD */ | |
2229 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2230 | { | |
2231 | return sys_ni_syscall(); | |
2232 | } | |
2233 | #endif |