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> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/syscalls.h> | |
36 | #include <linux/ctype.h> | |
37 | #include <linux/module.h> | |
38 | #include <linux/dirent.h> | |
39 | #include <linux/dnotify.h> | |
40 | #include <linux/highuid.h> | |
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/syscall.h> | |
44 | #include <linux/personality.h> | |
45 | #include <linux/rwsem.h> | |
46 | ||
47 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
48 | ||
49 | #include <asm/uaccess.h> | |
50 | #include <asm/mmu_context.h> | |
51 | #include <asm/ioctls.h> | |
52 | ||
53 | /* | |
54 | * Not all architectures have sys_utime, so implement this in terms | |
55 | * of sys_utimes. | |
56 | */ | |
57 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
58 | { | |
59 | struct timeval tv[2]; | |
60 | ||
61 | if (t) { | |
62 | if (get_user(tv[0].tv_sec, &t->actime) || | |
63 | get_user(tv[1].tv_sec, &t->modtime)) | |
64 | return -EFAULT; | |
65 | tv[0].tv_usec = 0; | |
66 | tv[1].tv_usec = 0; | |
67 | } | |
68 | return do_utimes(filename, t ? tv : NULL); | |
69 | } | |
70 | ||
71 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
72 | { | |
73 | struct timeval tv[2]; | |
74 | ||
75 | if (t) { | |
76 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || | |
77 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
78 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
79 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
80 | return -EFAULT; | |
81 | } | |
82 | return do_utimes(filename, t ? tv : NULL); | |
83 | } | |
84 | ||
85 | asmlinkage long compat_sys_newstat(char __user * filename, | |
86 | struct compat_stat __user *statbuf) | |
87 | { | |
88 | struct kstat stat; | |
89 | int error = vfs_stat(filename, &stat); | |
90 | ||
91 | if (!error) | |
92 | error = cp_compat_stat(&stat, statbuf); | |
93 | return error; | |
94 | } | |
95 | ||
96 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
97 | struct compat_stat __user *statbuf) | |
98 | { | |
99 | struct kstat stat; | |
100 | int error = vfs_lstat(filename, &stat); | |
101 | ||
102 | if (!error) | |
103 | error = cp_compat_stat(&stat, statbuf); | |
104 | return error; | |
105 | } | |
106 | ||
107 | asmlinkage long compat_sys_newfstat(unsigned int fd, | |
108 | struct compat_stat __user * statbuf) | |
109 | { | |
110 | struct kstat stat; | |
111 | int error = vfs_fstat(fd, &stat); | |
112 | ||
113 | if (!error) | |
114 | error = cp_compat_stat(&stat, statbuf); | |
115 | return error; | |
116 | } | |
117 | ||
118 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
119 | { | |
120 | ||
121 | if (sizeof ubuf->f_blocks == 4) { | |
122 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
123 | 0xffffffff00000000ULL) | |
124 | return -EOVERFLOW; | |
125 | /* f_files and f_ffree may be -1; it's okay | |
126 | * to stuff that into 32 bits */ | |
127 | if (kbuf->f_files != 0xffffffffffffffffULL | |
128 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
129 | return -EOVERFLOW; | |
130 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
131 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
132 | return -EOVERFLOW; | |
133 | } | |
134 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
135 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
136 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
137 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
138 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
139 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
140 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
141 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
142 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
143 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
144 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
145 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
146 | __put_user(0, &ubuf->f_spare[0]) || | |
147 | __put_user(0, &ubuf->f_spare[1]) || | |
148 | __put_user(0, &ubuf->f_spare[2]) || | |
149 | __put_user(0, &ubuf->f_spare[3]) || | |
150 | __put_user(0, &ubuf->f_spare[4])) | |
151 | return -EFAULT; | |
152 | return 0; | |
153 | } | |
154 | ||
155 | /* | |
156 | * The following statfs calls are copies of code from fs/open.c and | |
157 | * should be checked against those from time to time | |
158 | */ | |
159 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
160 | { | |
161 | struct nameidata nd; | |
162 | int error; | |
163 | ||
164 | error = user_path_walk(path, &nd); | |
165 | if (!error) { | |
166 | struct kstatfs tmp; | |
167 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); | |
168 | if (!error && put_compat_statfs(buf, &tmp)) | |
169 | error = -EFAULT; | |
170 | path_release(&nd); | |
171 | } | |
172 | return error; | |
173 | } | |
174 | ||
175 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
176 | { | |
177 | struct file * file; | |
178 | struct kstatfs tmp; | |
179 | int error; | |
180 | ||
181 | error = -EBADF; | |
182 | file = fget(fd); | |
183 | if (!file) | |
184 | goto out; | |
185 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); | |
186 | if (!error && put_compat_statfs(buf, &tmp)) | |
187 | error = -EFAULT; | |
188 | fput(file); | |
189 | out: | |
190 | return error; | |
191 | } | |
192 | ||
193 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
194 | { | |
195 | if (sizeof ubuf->f_blocks == 4) { | |
196 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
197 | 0xffffffff00000000ULL) | |
198 | return -EOVERFLOW; | |
199 | /* f_files and f_ffree may be -1; it's okay | |
200 | * to stuff that into 32 bits */ | |
201 | if (kbuf->f_files != 0xffffffffffffffffULL | |
202 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
203 | return -EOVERFLOW; | |
204 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
205 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
206 | return -EOVERFLOW; | |
207 | } | |
208 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
209 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
210 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
211 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
212 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
213 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
214 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
215 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
216 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
217 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
218 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
219 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
220 | return -EFAULT; | |
221 | return 0; | |
222 | } | |
223 | ||
224 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
225 | { | |
226 | struct nameidata nd; | |
227 | int error; | |
228 | ||
229 | if (sz != sizeof(*buf)) | |
230 | return -EINVAL; | |
231 | ||
232 | error = user_path_walk(path, &nd); | |
233 | if (!error) { | |
234 | struct kstatfs tmp; | |
235 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); | |
236 | if (!error && put_compat_statfs64(buf, &tmp)) | |
237 | error = -EFAULT; | |
238 | path_release(&nd); | |
239 | } | |
240 | return error; | |
241 | } | |
242 | ||
243 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
244 | { | |
245 | struct file * file; | |
246 | struct kstatfs tmp; | |
247 | int error; | |
248 | ||
249 | if (sz != sizeof(*buf)) | |
250 | return -EINVAL; | |
251 | ||
252 | error = -EBADF; | |
253 | file = fget(fd); | |
254 | if (!file) | |
255 | goto out; | |
256 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); | |
257 | if (!error && put_compat_statfs64(buf, &tmp)) | |
258 | error = -EFAULT; | |
259 | fput(file); | |
260 | out: | |
261 | return error; | |
262 | } | |
263 | ||
264 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
265 | ||
266 | #define IOCTL_HASHSIZE 256 | |
267 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
268 | static DECLARE_RWSEM(ioctl32_sem); | |
269 | ||
270 | extern struct ioctl_trans ioctl_start[]; | |
271 | extern int ioctl_table_size; | |
272 | ||
273 | static inline unsigned long ioctl32_hash(unsigned long cmd) | |
274 | { | |
275 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
276 | } | |
277 | ||
278 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
279 | { | |
280 | unsigned long hash; | |
281 | struct ioctl_trans *t; | |
282 | ||
283 | hash = ioctl32_hash (trans->cmd); | |
284 | if (!ioctl32_hash_table[hash]) | |
285 | ioctl32_hash_table[hash] = trans; | |
286 | else { | |
287 | t = ioctl32_hash_table[hash]; | |
288 | while (t->next) | |
289 | t = t->next; | |
290 | trans->next = NULL; | |
291 | t->next = trans; | |
292 | } | |
293 | } | |
294 | ||
295 | static int __init init_sys32_ioctl(void) | |
296 | { | |
297 | int i; | |
298 | ||
299 | for (i = 0; i < ioctl_table_size; i++) { | |
300 | if (ioctl_start[i].next != 0) { | |
301 | printk("ioctl translation %d bad\n",i); | |
302 | return -1; | |
303 | } | |
304 | ||
305 | ioctl32_insert_translation(&ioctl_start[i]); | |
306 | } | |
307 | return 0; | |
308 | } | |
309 | ||
310 | __initcall(init_sys32_ioctl); | |
311 | ||
312 | int register_ioctl32_conversion(unsigned int cmd, | |
313 | ioctl_trans_handler_t handler) | |
314 | { | |
315 | struct ioctl_trans *t; | |
316 | struct ioctl_trans *new_t; | |
317 | unsigned long hash = ioctl32_hash(cmd); | |
318 | ||
319 | new_t = kmalloc(sizeof(*new_t), GFP_KERNEL); | |
320 | if (!new_t) | |
321 | return -ENOMEM; | |
322 | ||
323 | down_write(&ioctl32_sem); | |
324 | for (t = ioctl32_hash_table[hash]; t; t = t->next) { | |
325 | if (t->cmd == cmd) { | |
326 | printk(KERN_ERR "Trying to register duplicated ioctl32 " | |
327 | "handler %x\n", cmd); | |
328 | up_write(&ioctl32_sem); | |
329 | kfree(new_t); | |
330 | return -EINVAL; | |
331 | } | |
332 | } | |
333 | new_t->next = NULL; | |
334 | new_t->cmd = cmd; | |
335 | new_t->handler = handler; | |
336 | ioctl32_insert_translation(new_t); | |
337 | ||
338 | up_write(&ioctl32_sem); | |
339 | return 0; | |
340 | } | |
341 | EXPORT_SYMBOL(register_ioctl32_conversion); | |
342 | ||
343 | static inline int builtin_ioctl(struct ioctl_trans *t) | |
344 | { | |
345 | return t >= ioctl_start && t < (ioctl_start + ioctl_table_size); | |
346 | } | |
347 | ||
348 | /* Problem: | |
349 | This function cannot unregister duplicate ioctls, because they are not | |
350 | unique. | |
351 | When they happen we need to extend the prototype to pass the handler too. */ | |
352 | ||
353 | int unregister_ioctl32_conversion(unsigned int cmd) | |
354 | { | |
355 | unsigned long hash = ioctl32_hash(cmd); | |
356 | struct ioctl_trans *t, *t1; | |
357 | ||
358 | down_write(&ioctl32_sem); | |
359 | ||
360 | t = ioctl32_hash_table[hash]; | |
361 | if (!t) { | |
362 | up_write(&ioctl32_sem); | |
363 | return -EINVAL; | |
364 | } | |
365 | ||
366 | if (t->cmd == cmd) { | |
367 | if (builtin_ioctl(t)) { | |
368 | printk("%p tried to unregister builtin ioctl %x\n", | |
369 | __builtin_return_address(0), cmd); | |
370 | } else { | |
371 | ioctl32_hash_table[hash] = t->next; | |
372 | up_write(&ioctl32_sem); | |
373 | kfree(t); | |
374 | return 0; | |
375 | } | |
376 | } | |
377 | while (t->next) { | |
378 | t1 = t->next; | |
379 | if (t1->cmd == cmd) { | |
380 | if (builtin_ioctl(t1)) { | |
381 | printk("%p tried to unregister builtin " | |
382 | "ioctl %x\n", | |
383 | __builtin_return_address(0), cmd); | |
384 | goto out; | |
385 | } else { | |
386 | t->next = t1->next; | |
387 | up_write(&ioctl32_sem); | |
388 | kfree(t1); | |
389 | return 0; | |
390 | } | |
391 | } | |
392 | t = t1; | |
393 | } | |
394 | printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n", | |
395 | cmd); | |
396 | out: | |
397 | up_write(&ioctl32_sem); | |
398 | return -EINVAL; | |
399 | } | |
400 | EXPORT_SYMBOL(unregister_ioctl32_conversion); | |
401 | ||
402 | static void compat_ioctl_error(struct file *filp, unsigned int fd, | |
403 | unsigned int cmd, unsigned long arg) | |
404 | { | |
405 | char buf[10]; | |
406 | char *fn = "?"; | |
407 | char *path; | |
408 | ||
409 | /* find the name of the device. */ | |
410 | path = (char *)__get_free_page(GFP_KERNEL); | |
411 | if (path) { | |
412 | fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); | |
413 | if (IS_ERR(fn)) | |
414 | fn = "?"; | |
415 | } | |
416 | ||
417 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); | |
418 | if (!isprint(buf[1])) | |
419 | sprintf(buf, "%02x", buf[1]); | |
420 | printk("ioctl32(%s:%d): Unknown cmd fd(%d) " | |
421 | "cmd(%08x){%s} arg(%08x) on %s\n", | |
422 | current->comm, current->pid, | |
423 | (int)fd, (unsigned int)cmd, buf, | |
424 | (unsigned int)arg, fn); | |
425 | ||
426 | if (path) | |
427 | free_page((unsigned long)path); | |
428 | } | |
429 | ||
430 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
431 | unsigned long arg) | |
432 | { | |
433 | struct file *filp; | |
434 | int error = -EBADF; | |
435 | struct ioctl_trans *t; | |
436 | int fput_needed; | |
437 | ||
438 | filp = fget_light(fd, &fput_needed); | |
439 | if (!filp) | |
440 | goto out; | |
441 | ||
442 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
443 | error = security_file_ioctl(filp, cmd, arg); | |
444 | if (error) | |
445 | goto out_fput; | |
446 | ||
447 | /* | |
448 | * To allow the compat_ioctl handlers to be self contained | |
449 | * we need to check the common ioctls here first. | |
450 | * Just handle them with the standard handlers below. | |
451 | */ | |
452 | switch (cmd) { | |
453 | case FIOCLEX: | |
454 | case FIONCLEX: | |
455 | case FIONBIO: | |
456 | case FIOASYNC: | |
457 | case FIOQSIZE: | |
458 | break; | |
459 | ||
460 | case FIBMAP: | |
461 | case FIGETBSZ: | |
462 | case FIONREAD: | |
463 | if (S_ISREG(filp->f_dentry->d_inode->i_mode)) | |
464 | break; | |
465 | /*FALL THROUGH*/ | |
466 | ||
467 | default: | |
468 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
469 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
470 | if (error != -ENOIOCTLCMD) | |
471 | goto out_fput; | |
472 | } | |
473 | ||
474 | if (!filp->f_op || | |
475 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
476 | goto do_ioctl; | |
477 | break; | |
478 | } | |
479 | ||
480 | /* When register_ioctl32_conversion is finally gone remove | |
481 | this lock! -AK */ | |
482 | down_read(&ioctl32_sem); | |
483 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { | |
484 | if (t->cmd == cmd) | |
485 | goto found_handler; | |
486 | } | |
487 | up_read(&ioctl32_sem); | |
488 | ||
489 | if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && | |
490 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
491 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
492 | } else { | |
493 | static int count; | |
494 | ||
495 | if (++count <= 50) | |
496 | compat_ioctl_error(filp, fd, cmd, arg); | |
497 | error = -EINVAL; | |
498 | } | |
499 | ||
500 | goto out_fput; | |
501 | ||
502 | found_handler: | |
503 | if (t->handler) { | |
504 | lock_kernel(); | |
505 | error = t->handler(fd, cmd, arg, filp); | |
506 | unlock_kernel(); | |
507 | up_read(&ioctl32_sem); | |
508 | goto out_fput; | |
509 | } | |
510 | ||
511 | up_read(&ioctl32_sem); | |
512 | do_ioctl: | |
513 | error = vfs_ioctl(filp, fd, cmd, arg); | |
514 | out_fput: | |
515 | fput_light(filp, fput_needed); | |
516 | out: | |
517 | return error; | |
518 | } | |
519 | ||
520 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
521 | { | |
522 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
523 | __get_user(kfl->l_type, &ufl->l_type) || | |
524 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
525 | __get_user(kfl->l_start, &ufl->l_start) || | |
526 | __get_user(kfl->l_len, &ufl->l_len) || | |
527 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
528 | return -EFAULT; | |
529 | return 0; | |
530 | } | |
531 | ||
532 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
533 | { | |
534 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
535 | __put_user(kfl->l_type, &ufl->l_type) || | |
536 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
537 | __put_user(kfl->l_start, &ufl->l_start) || | |
538 | __put_user(kfl->l_len, &ufl->l_len) || | |
539 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
540 | return -EFAULT; | |
541 | return 0; | |
542 | } | |
543 | ||
544 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
545 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
546 | { | |
547 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
548 | __get_user(kfl->l_type, &ufl->l_type) || | |
549 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
550 | __get_user(kfl->l_start, &ufl->l_start) || | |
551 | __get_user(kfl->l_len, &ufl->l_len) || | |
552 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
553 | return -EFAULT; | |
554 | return 0; | |
555 | } | |
556 | #endif | |
557 | ||
558 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
559 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
560 | { | |
561 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
562 | __put_user(kfl->l_type, &ufl->l_type) || | |
563 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
564 | __put_user(kfl->l_start, &ufl->l_start) || | |
565 | __put_user(kfl->l_len, &ufl->l_len) || | |
566 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
567 | return -EFAULT; | |
568 | return 0; | |
569 | } | |
570 | #endif | |
571 | ||
572 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
573 | unsigned long arg) | |
574 | { | |
575 | mm_segment_t old_fs; | |
576 | struct flock f; | |
577 | long ret; | |
578 | ||
579 | switch (cmd) { | |
580 | case F_GETLK: | |
581 | case F_SETLK: | |
582 | case F_SETLKW: | |
583 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
584 | if (ret != 0) | |
585 | break; | |
586 | old_fs = get_fs(); | |
587 | set_fs(KERNEL_DS); | |
588 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
589 | set_fs(old_fs); | |
590 | if (cmd == F_GETLK && ret == 0) { | |
591 | if ((f.l_start >= COMPAT_OFF_T_MAX) || | |
592 | ((f.l_start + f.l_len) > COMPAT_OFF_T_MAX)) | |
593 | ret = -EOVERFLOW; | |
594 | if (ret == 0) | |
595 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
596 | } | |
597 | break; | |
598 | ||
599 | case F_GETLK64: | |
600 | case F_SETLK64: | |
601 | case F_SETLKW64: | |
602 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
603 | if (ret != 0) | |
604 | break; | |
605 | old_fs = get_fs(); | |
606 | set_fs(KERNEL_DS); | |
607 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
608 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
609 | (unsigned long)&f); | |
610 | set_fs(old_fs); | |
611 | if (cmd == F_GETLK64 && ret == 0) { | |
612 | if ((f.l_start >= COMPAT_LOFF_T_MAX) || | |
613 | ((f.l_start + f.l_len) > COMPAT_LOFF_T_MAX)) | |
614 | ret = -EOVERFLOW; | |
615 | if (ret == 0) | |
616 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
617 | } | |
618 | break; | |
619 | ||
620 | default: | |
621 | ret = sys_fcntl(fd, cmd, arg); | |
622 | break; | |
623 | } | |
624 | return ret; | |
625 | } | |
626 | ||
627 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
628 | unsigned long arg) | |
629 | { | |
630 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
631 | return -EINVAL; | |
632 | return compat_sys_fcntl64(fd, cmd, arg); | |
633 | } | |
634 | ||
635 | asmlinkage long | |
636 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
637 | { | |
638 | long ret; | |
639 | aio_context_t ctx64; | |
640 | ||
641 | mm_segment_t oldfs = get_fs(); | |
642 | if (unlikely(get_user(ctx64, ctx32p))) | |
643 | return -EFAULT; | |
644 | ||
645 | set_fs(KERNEL_DS); | |
646 | /* The __user pointer cast is valid because of the set_fs() */ | |
647 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
648 | set_fs(oldfs); | |
649 | /* truncating is ok because it's a user address */ | |
650 | if (!ret) | |
651 | ret = put_user((u32) ctx64, ctx32p); | |
652 | return ret; | |
653 | } | |
654 | ||
655 | asmlinkage long | |
656 | compat_sys_io_getevents(aio_context_t ctx_id, | |
657 | unsigned long min_nr, | |
658 | unsigned long nr, | |
659 | struct io_event __user *events, | |
660 | struct compat_timespec __user *timeout) | |
661 | { | |
662 | long ret; | |
663 | struct timespec t; | |
664 | struct timespec __user *ut = NULL; | |
665 | ||
666 | ret = -EFAULT; | |
667 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
668 | nr * sizeof(struct io_event)))) | |
669 | goto out; | |
670 | if (timeout) { | |
671 | if (get_compat_timespec(&t, timeout)) | |
672 | goto out; | |
673 | ||
674 | ut = compat_alloc_user_space(sizeof(*ut)); | |
675 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
676 | goto out; | |
677 | } | |
678 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
679 | out: | |
680 | return ret; | |
681 | } | |
682 | ||
683 | static inline long | |
684 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
685 | { | |
686 | compat_uptr_t uptr; | |
687 | int i; | |
688 | ||
689 | for (i = 0; i < nr; ++i) { | |
690 | if (get_user(uptr, ptr32 + i)) | |
691 | return -EFAULT; | |
692 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
693 | return -EFAULT; | |
694 | } | |
695 | return 0; | |
696 | } | |
697 | ||
698 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
699 | ||
700 | asmlinkage long | |
701 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
702 | { | |
703 | struct iocb __user * __user *iocb64; | |
704 | long ret; | |
705 | ||
706 | if (unlikely(nr < 0)) | |
707 | return -EINVAL; | |
708 | ||
709 | if (nr > MAX_AIO_SUBMITS) | |
710 | nr = MAX_AIO_SUBMITS; | |
711 | ||
712 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
713 | ret = copy_iocb(nr, iocb, iocb64); | |
714 | if (!ret) | |
715 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
716 | return ret; | |
717 | } | |
718 | ||
719 | struct compat_ncp_mount_data { | |
720 | compat_int_t version; | |
721 | compat_uint_t ncp_fd; | |
722 | compat_uid_t mounted_uid; | |
723 | compat_pid_t wdog_pid; | |
724 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
725 | compat_uint_t time_out; | |
726 | compat_uint_t retry_count; | |
727 | compat_uint_t flags; | |
728 | compat_uid_t uid; | |
729 | compat_gid_t gid; | |
730 | compat_mode_t file_mode; | |
731 | compat_mode_t dir_mode; | |
732 | }; | |
733 | ||
734 | struct compat_ncp_mount_data_v4 { | |
735 | compat_int_t version; | |
736 | compat_ulong_t flags; | |
737 | compat_ulong_t mounted_uid; | |
738 | compat_long_t wdog_pid; | |
739 | compat_uint_t ncp_fd; | |
740 | compat_uint_t time_out; | |
741 | compat_uint_t retry_count; | |
742 | compat_ulong_t uid; | |
743 | compat_ulong_t gid; | |
744 | compat_ulong_t file_mode; | |
745 | compat_ulong_t dir_mode; | |
746 | }; | |
747 | ||
748 | static void *do_ncp_super_data_conv(void *raw_data) | |
749 | { | |
750 | int version = *(unsigned int *)raw_data; | |
751 | ||
752 | if (version == 3) { | |
753 | struct compat_ncp_mount_data *c_n = raw_data; | |
754 | struct ncp_mount_data *n = raw_data; | |
755 | ||
756 | n->dir_mode = c_n->dir_mode; | |
757 | n->file_mode = c_n->file_mode; | |
758 | n->gid = c_n->gid; | |
759 | n->uid = c_n->uid; | |
760 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
761 | n->wdog_pid = c_n->wdog_pid; | |
762 | n->mounted_uid = c_n->mounted_uid; | |
763 | } else if (version == 4) { | |
764 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
765 | struct ncp_mount_data_v4 *n = raw_data; | |
766 | ||
767 | n->dir_mode = c_n->dir_mode; | |
768 | n->file_mode = c_n->file_mode; | |
769 | n->gid = c_n->gid; | |
770 | n->uid = c_n->uid; | |
771 | n->retry_count = c_n->retry_count; | |
772 | n->time_out = c_n->time_out; | |
773 | n->ncp_fd = c_n->ncp_fd; | |
774 | n->wdog_pid = c_n->wdog_pid; | |
775 | n->mounted_uid = c_n->mounted_uid; | |
776 | n->flags = c_n->flags; | |
777 | } else if (version != 5) { | |
778 | return NULL; | |
779 | } | |
780 | ||
781 | return raw_data; | |
782 | } | |
783 | ||
784 | struct compat_smb_mount_data { | |
785 | compat_int_t version; | |
786 | compat_uid_t mounted_uid; | |
787 | compat_uid_t uid; | |
788 | compat_gid_t gid; | |
789 | compat_mode_t file_mode; | |
790 | compat_mode_t dir_mode; | |
791 | }; | |
792 | ||
793 | static void *do_smb_super_data_conv(void *raw_data) | |
794 | { | |
795 | struct smb_mount_data *s = raw_data; | |
796 | struct compat_smb_mount_data *c_s = raw_data; | |
797 | ||
798 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
799 | goto out; | |
800 | s->dir_mode = c_s->dir_mode; | |
801 | s->file_mode = c_s->file_mode; | |
802 | s->gid = c_s->gid; | |
803 | s->uid = c_s->uid; | |
804 | s->mounted_uid = c_s->mounted_uid; | |
805 | out: | |
806 | return raw_data; | |
807 | } | |
808 | ||
809 | extern int copy_mount_options (const void __user *, unsigned long *); | |
810 | ||
811 | #define SMBFS_NAME "smbfs" | |
812 | #define NCPFS_NAME "ncpfs" | |
813 | ||
814 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
815 | char __user * type, unsigned long flags, | |
816 | void __user * data) | |
817 | { | |
818 | unsigned long type_page; | |
819 | unsigned long data_page; | |
820 | unsigned long dev_page; | |
821 | char *dir_page; | |
822 | int retval; | |
823 | ||
824 | retval = copy_mount_options (type, &type_page); | |
825 | if (retval < 0) | |
826 | goto out; | |
827 | ||
828 | dir_page = getname(dir_name); | |
829 | retval = PTR_ERR(dir_page); | |
830 | if (IS_ERR(dir_page)) | |
831 | goto out1; | |
832 | ||
833 | retval = copy_mount_options (dev_name, &dev_page); | |
834 | if (retval < 0) | |
835 | goto out2; | |
836 | ||
837 | retval = copy_mount_options (data, &data_page); | |
838 | if (retval < 0) | |
839 | goto out3; | |
840 | ||
841 | retval = -EINVAL; | |
842 | ||
843 | if (type_page) { | |
844 | if (!strcmp((char *)type_page, SMBFS_NAME)) { | |
845 | do_smb_super_data_conv((void *)data_page); | |
846 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
847 | do_ncp_super_data_conv((void *)data_page); | |
848 | } | |
849 | } | |
850 | ||
851 | lock_kernel(); | |
852 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
853 | flags, (void*)data_page); | |
854 | unlock_kernel(); | |
855 | ||
856 | free_page(data_page); | |
857 | out3: | |
858 | free_page(dev_page); | |
859 | out2: | |
860 | putname(dir_page); | |
861 | out1: | |
862 | free_page(type_page); | |
863 | out: | |
864 | return retval; | |
865 | } | |
866 | ||
867 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
868 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ | |
869 | ~(sizeof(compat_long_t)-1)) | |
870 | ||
871 | struct compat_old_linux_dirent { | |
872 | compat_ulong_t d_ino; | |
873 | compat_ulong_t d_offset; | |
874 | unsigned short d_namlen; | |
875 | char d_name[1]; | |
876 | }; | |
877 | ||
878 | struct compat_readdir_callback { | |
879 | struct compat_old_linux_dirent __user *dirent; | |
880 | int result; | |
881 | }; | |
882 | ||
883 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
884 | loff_t offset, ino_t ino, unsigned int d_type) | |
885 | { | |
886 | struct compat_readdir_callback *buf = __buf; | |
887 | struct compat_old_linux_dirent __user *dirent; | |
888 | ||
889 | if (buf->result) | |
890 | return -EINVAL; | |
891 | buf->result++; | |
892 | dirent = buf->dirent; | |
893 | if (!access_ok(VERIFY_WRITE, dirent, | |
894 | (unsigned long)(dirent->d_name + namlen + 1) - | |
895 | (unsigned long)dirent)) | |
896 | goto efault; | |
897 | if ( __put_user(ino, &dirent->d_ino) || | |
898 | __put_user(offset, &dirent->d_offset) || | |
899 | __put_user(namlen, &dirent->d_namlen) || | |
900 | __copy_to_user(dirent->d_name, name, namlen) || | |
901 | __put_user(0, dirent->d_name + namlen)) | |
902 | goto efault; | |
903 | return 0; | |
904 | efault: | |
905 | buf->result = -EFAULT; | |
906 | return -EFAULT; | |
907 | } | |
908 | ||
909 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
910 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
911 | { | |
912 | int error; | |
913 | struct file *file; | |
914 | struct compat_readdir_callback buf; | |
915 | ||
916 | error = -EBADF; | |
917 | file = fget(fd); | |
918 | if (!file) | |
919 | goto out; | |
920 | ||
921 | buf.result = 0; | |
922 | buf.dirent = dirent; | |
923 | ||
924 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
925 | if (error >= 0) | |
926 | error = buf.result; | |
927 | ||
928 | fput(file); | |
929 | out: | |
930 | return error; | |
931 | } | |
932 | ||
933 | struct compat_linux_dirent { | |
934 | compat_ulong_t d_ino; | |
935 | compat_ulong_t d_off; | |
936 | unsigned short d_reclen; | |
937 | char d_name[1]; | |
938 | }; | |
939 | ||
940 | struct compat_getdents_callback { | |
941 | struct compat_linux_dirent __user *current_dir; | |
942 | struct compat_linux_dirent __user *previous; | |
943 | int count; | |
944 | int error; | |
945 | }; | |
946 | ||
947 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
948 | loff_t offset, ino_t ino, unsigned int d_type) | |
949 | { | |
950 | struct compat_linux_dirent __user * dirent; | |
951 | struct compat_getdents_callback *buf = __buf; | |
952 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); | |
953 | ||
954 | buf->error = -EINVAL; /* only used if we fail.. */ | |
955 | if (reclen > buf->count) | |
956 | return -EINVAL; | |
957 | dirent = buf->previous; | |
958 | if (dirent) { | |
959 | if (__put_user(offset, &dirent->d_off)) | |
960 | goto efault; | |
961 | } | |
962 | dirent = buf->current_dir; | |
963 | if (__put_user(ino, &dirent->d_ino)) | |
964 | goto efault; | |
965 | if (__put_user(reclen, &dirent->d_reclen)) | |
966 | goto efault; | |
967 | if (copy_to_user(dirent->d_name, name, namlen)) | |
968 | goto efault; | |
969 | if (__put_user(0, dirent->d_name + namlen)) | |
970 | goto efault; | |
971 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
972 | goto efault; | |
973 | buf->previous = dirent; | |
974 | dirent = (void __user *)dirent + reclen; | |
975 | buf->current_dir = dirent; | |
976 | buf->count -= reclen; | |
977 | return 0; | |
978 | efault: | |
979 | buf->error = -EFAULT; | |
980 | return -EFAULT; | |
981 | } | |
982 | ||
983 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
984 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
985 | { | |
986 | struct file * file; | |
987 | struct compat_linux_dirent __user * lastdirent; | |
988 | struct compat_getdents_callback buf; | |
989 | int error; | |
990 | ||
991 | error = -EFAULT; | |
992 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
993 | goto out; | |
994 | ||
995 | error = -EBADF; | |
996 | file = fget(fd); | |
997 | if (!file) | |
998 | goto out; | |
999 | ||
1000 | buf.current_dir = dirent; | |
1001 | buf.previous = NULL; | |
1002 | buf.count = count; | |
1003 | buf.error = 0; | |
1004 | ||
1005 | error = vfs_readdir(file, compat_filldir, &buf); | |
1006 | if (error < 0) | |
1007 | goto out_putf; | |
1008 | error = buf.error; | |
1009 | lastdirent = buf.previous; | |
1010 | if (lastdirent) { | |
1011 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1012 | error = -EFAULT; | |
1013 | else | |
1014 | error = count - buf.count; | |
1015 | } | |
1016 | ||
1017 | out_putf: | |
1018 | fput(file); | |
1019 | out: | |
1020 | return error; | |
1021 | } | |
1022 | ||
1023 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1024 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1025 | ||
1026 | struct compat_getdents_callback64 { | |
1027 | struct linux_dirent64 __user *current_dir; | |
1028 | struct linux_dirent64 __user *previous; | |
1029 | int count; | |
1030 | int error; | |
1031 | }; | |
1032 | ||
1033 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
1034 | ino_t ino, unsigned int d_type) | |
1035 | { | |
1036 | struct linux_dirent64 __user *dirent; | |
1037 | struct compat_getdents_callback64 *buf = __buf; | |
1038 | int jj = NAME_OFFSET(dirent); | |
1039 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1040 | u64 off; | |
1041 | ||
1042 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1043 | if (reclen > buf->count) | |
1044 | return -EINVAL; | |
1045 | dirent = buf->previous; | |
1046 | ||
1047 | if (dirent) { | |
1048 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1049 | goto efault; | |
1050 | } | |
1051 | dirent = buf->current_dir; | |
1052 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1053 | goto efault; | |
1054 | off = 0; | |
1055 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1056 | goto efault; | |
1057 | if (__put_user(reclen, &dirent->d_reclen)) | |
1058 | goto efault; | |
1059 | if (__put_user(d_type, &dirent->d_type)) | |
1060 | goto efault; | |
1061 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1062 | goto efault; | |
1063 | if (__put_user(0, dirent->d_name + namlen)) | |
1064 | goto efault; | |
1065 | buf->previous = dirent; | |
1066 | dirent = (void __user *)dirent + reclen; | |
1067 | buf->current_dir = dirent; | |
1068 | buf->count -= reclen; | |
1069 | return 0; | |
1070 | efault: | |
1071 | buf->error = -EFAULT; | |
1072 | return -EFAULT; | |
1073 | } | |
1074 | ||
1075 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1076 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1077 | { | |
1078 | struct file * file; | |
1079 | struct linux_dirent64 __user * lastdirent; | |
1080 | struct compat_getdents_callback64 buf; | |
1081 | int error; | |
1082 | ||
1083 | error = -EFAULT; | |
1084 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1085 | goto out; | |
1086 | ||
1087 | error = -EBADF; | |
1088 | file = fget(fd); | |
1089 | if (!file) | |
1090 | goto out; | |
1091 | ||
1092 | buf.current_dir = dirent; | |
1093 | buf.previous = NULL; | |
1094 | buf.count = count; | |
1095 | buf.error = 0; | |
1096 | ||
1097 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1098 | if (error < 0) | |
1099 | goto out_putf; | |
1100 | error = buf.error; | |
1101 | lastdirent = buf.previous; | |
1102 | if (lastdirent) { | |
1103 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
1104 | __put_user_unaligned(d_off, &lastdirent->d_off); | |
1105 | error = count - buf.count; | |
1106 | } | |
1107 | ||
1108 | out_putf: | |
1109 | fput(file); | |
1110 | out: | |
1111 | return error; | |
1112 | } | |
1113 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1114 | ||
1115 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1116 | const struct compat_iovec __user *uvector, | |
1117 | unsigned long nr_segs, loff_t *pos) | |
1118 | { | |
1119 | typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *); | |
1120 | typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *); | |
1121 | ||
1122 | compat_ssize_t tot_len; | |
1123 | struct iovec iovstack[UIO_FASTIOV]; | |
1124 | struct iovec *iov=iovstack, *vector; | |
1125 | ssize_t ret; | |
1126 | int seg; | |
1127 | io_fn_t fn; | |
1128 | iov_fn_t fnv; | |
1129 | ||
1130 | /* | |
1131 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1132 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1133 | * traditionally returned zero for zero segments, so... | |
1134 | */ | |
1135 | ret = 0; | |
1136 | if (nr_segs == 0) | |
1137 | goto out; | |
1138 | ||
1139 | /* | |
1140 | * First get the "struct iovec" from user memory and | |
1141 | * verify all the pointers | |
1142 | */ | |
1143 | ret = -EINVAL; | |
1144 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1145 | goto out; | |
1146 | if (!file->f_op) | |
1147 | goto out; | |
1148 | if (nr_segs > UIO_FASTIOV) { | |
1149 | ret = -ENOMEM; | |
1150 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1151 | if (!iov) | |
1152 | goto out; | |
1153 | } | |
1154 | ret = -EFAULT; | |
1155 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1156 | goto out; | |
1157 | ||
1158 | /* | |
1159 | * Single unix specification: | |
1160 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1161 | * ssize_t. The total length is fitting an ssize_t | |
1162 | * | |
1163 | * Be careful here because iov_len is a size_t not an ssize_t | |
1164 | */ | |
1165 | tot_len = 0; | |
1166 | vector = iov; | |
1167 | ret = -EINVAL; | |
1168 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1169 | compat_ssize_t tmp = tot_len; | |
1170 | compat_ssize_t len; | |
1171 | compat_uptr_t buf; | |
1172 | ||
1173 | if (__get_user(len, &uvector->iov_len) || | |
1174 | __get_user(buf, &uvector->iov_base)) { | |
1175 | ret = -EFAULT; | |
1176 | goto out; | |
1177 | } | |
1178 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1179 | goto out; | |
1180 | tot_len += len; | |
1181 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1182 | goto out; | |
1183 | vector->iov_base = compat_ptr(buf); | |
1184 | vector->iov_len = (compat_size_t) len; | |
1185 | uvector++; | |
1186 | vector++; | |
1187 | } | |
1188 | if (tot_len == 0) { | |
1189 | ret = 0; | |
1190 | goto out; | |
1191 | } | |
1192 | ||
1193 | ret = rw_verify_area(type, file, pos, tot_len); | |
1194 | if (ret) | |
1195 | goto out; | |
1196 | ||
1197 | fnv = NULL; | |
1198 | if (type == READ) { | |
1199 | fn = file->f_op->read; | |
1200 | fnv = file->f_op->readv; | |
1201 | } else { | |
1202 | fn = (io_fn_t)file->f_op->write; | |
1203 | fnv = file->f_op->writev; | |
1204 | } | |
1205 | if (fnv) { | |
1206 | ret = fnv(file, iov, nr_segs, pos); | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | /* Do it by hand, with file-ops */ | |
1211 | ret = 0; | |
1212 | vector = iov; | |
1213 | while (nr_segs > 0) { | |
1214 | void __user * base; | |
1215 | size_t len; | |
1216 | ssize_t nr; | |
1217 | ||
1218 | base = vector->iov_base; | |
1219 | len = vector->iov_len; | |
1220 | vector++; | |
1221 | nr_segs--; | |
1222 | ||
1223 | nr = fn(file, base, len, pos); | |
1224 | ||
1225 | if (nr < 0) { | |
1226 | if (!ret) ret = nr; | |
1227 | break; | |
1228 | } | |
1229 | ret += nr; | |
1230 | if (nr != len) | |
1231 | break; | |
1232 | } | |
1233 | out: | |
1234 | if (iov != iovstack) | |
1235 | kfree(iov); | |
1236 | if ((ret + (type == READ)) > 0) | |
1237 | dnotify_parent(file->f_dentry, | |
1238 | (type == READ) ? DN_ACCESS : DN_MODIFY); | |
1239 | return ret; | |
1240 | } | |
1241 | ||
1242 | asmlinkage ssize_t | |
1243 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1244 | { | |
1245 | struct file *file; | |
1246 | ssize_t ret = -EBADF; | |
1247 | ||
1248 | file = fget(fd); | |
1249 | if (!file) | |
1250 | return -EBADF; | |
1251 | ||
1252 | if (!(file->f_mode & FMODE_READ)) | |
1253 | goto out; | |
1254 | ||
1255 | ret = -EINVAL; | |
1256 | if (!file->f_op || (!file->f_op->readv && !file->f_op->read)) | |
1257 | goto out; | |
1258 | ||
1259 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1260 | ||
1261 | out: | |
1262 | fput(file); | |
1263 | return ret; | |
1264 | } | |
1265 | ||
1266 | asmlinkage ssize_t | |
1267 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1268 | { | |
1269 | struct file *file; | |
1270 | ssize_t ret = -EBADF; | |
1271 | ||
1272 | file = fget(fd); | |
1273 | if (!file) | |
1274 | return -EBADF; | |
1275 | if (!(file->f_mode & FMODE_WRITE)) | |
1276 | goto out; | |
1277 | ||
1278 | ret = -EINVAL; | |
1279 | if (!file->f_op || (!file->f_op->writev && !file->f_op->write)) | |
1280 | goto out; | |
1281 | ||
1282 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1283 | ||
1284 | out: | |
1285 | fput(file); | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1291 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1292 | * and envp pointers. | |
1293 | */ | |
1294 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1295 | { | |
1296 | int i = 0; | |
1297 | ||
1298 | if (argv != NULL) { | |
1299 | for (;;) { | |
1300 | compat_uptr_t p; | |
1301 | ||
1302 | if (get_user(p, argv)) | |
1303 | return -EFAULT; | |
1304 | if (!p) | |
1305 | break; | |
1306 | argv++; | |
1307 | if(++i > max) | |
1308 | return -E2BIG; | |
1309 | } | |
1310 | } | |
1311 | return i; | |
1312 | } | |
1313 | ||
1314 | /* | |
1315 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1316 | * except that it works with 32 bit argv and envp pointers. | |
1317 | */ | |
1318 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1319 | struct linux_binprm *bprm) | |
1320 | { | |
1321 | struct page *kmapped_page = NULL; | |
1322 | char *kaddr = NULL; | |
1323 | int ret; | |
1324 | ||
1325 | while (argc-- > 0) { | |
1326 | compat_uptr_t str; | |
1327 | int len; | |
1328 | unsigned long pos; | |
1329 | ||
1330 | if (get_user(str, argv+argc) || | |
1331 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1332 | ret = -EFAULT; | |
1333 | goto out; | |
1334 | } | |
1335 | ||
1336 | if (bprm->p < len) { | |
1337 | ret = -E2BIG; | |
1338 | goto out; | |
1339 | } | |
1340 | ||
1341 | bprm->p -= len; | |
1342 | /* XXX: add architecture specific overflow check here. */ | |
1343 | pos = bprm->p; | |
1344 | ||
1345 | while (len > 0) { | |
1346 | int i, new, err; | |
1347 | int offset, bytes_to_copy; | |
1348 | struct page *page; | |
1349 | ||
1350 | offset = pos % PAGE_SIZE; | |
1351 | i = pos/PAGE_SIZE; | |
1352 | page = bprm->page[i]; | |
1353 | new = 0; | |
1354 | if (!page) { | |
1355 | page = alloc_page(GFP_HIGHUSER); | |
1356 | bprm->page[i] = page; | |
1357 | if (!page) { | |
1358 | ret = -ENOMEM; | |
1359 | goto out; | |
1360 | } | |
1361 | new = 1; | |
1362 | } | |
1363 | ||
1364 | if (page != kmapped_page) { | |
1365 | if (kmapped_page) | |
1366 | kunmap(kmapped_page); | |
1367 | kmapped_page = page; | |
1368 | kaddr = kmap(kmapped_page); | |
1369 | } | |
1370 | if (new && offset) | |
1371 | memset(kaddr, 0, offset); | |
1372 | bytes_to_copy = PAGE_SIZE - offset; | |
1373 | if (bytes_to_copy > len) { | |
1374 | bytes_to_copy = len; | |
1375 | if (new) | |
1376 | memset(kaddr+offset+len, 0, | |
1377 | PAGE_SIZE-offset-len); | |
1378 | } | |
1379 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1380 | bytes_to_copy); | |
1381 | if (err) { | |
1382 | ret = -EFAULT; | |
1383 | goto out; | |
1384 | } | |
1385 | ||
1386 | pos += bytes_to_copy; | |
1387 | str += bytes_to_copy; | |
1388 | len -= bytes_to_copy; | |
1389 | } | |
1390 | } | |
1391 | ret = 0; | |
1392 | out: | |
1393 | if (kmapped_page) | |
1394 | kunmap(kmapped_page); | |
1395 | return ret; | |
1396 | } | |
1397 | ||
1398 | #ifdef CONFIG_MMU | |
1399 | ||
1400 | #define free_arg_pages(bprm) do { } while (0) | |
1401 | ||
1402 | #else | |
1403 | ||
1404 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1405 | { | |
1406 | int i; | |
1407 | ||
1408 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1409 | if (bprm->page[i]) | |
1410 | __free_page(bprm->page[i]); | |
1411 | bprm->page[i] = NULL; | |
1412 | } | |
1413 | } | |
1414 | ||
1415 | #endif /* CONFIG_MMU */ | |
1416 | ||
1417 | /* | |
1418 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1419 | * that it processes 32 bit argv and envp pointers. | |
1420 | */ | |
1421 | int compat_do_execve(char * filename, | |
1422 | compat_uptr_t __user *argv, | |
1423 | compat_uptr_t __user *envp, | |
1424 | struct pt_regs * regs) | |
1425 | { | |
1426 | struct linux_binprm *bprm; | |
1427 | struct file *file; | |
1428 | int retval; | |
1429 | int i; | |
1430 | ||
1431 | retval = -ENOMEM; | |
1432 | bprm = kmalloc(sizeof(*bprm), GFP_KERNEL); | |
1433 | if (!bprm) | |
1434 | goto out_ret; | |
1435 | memset(bprm, 0, sizeof(*bprm)); | |
1436 | ||
1437 | file = open_exec(filename); | |
1438 | retval = PTR_ERR(file); | |
1439 | if (IS_ERR(file)) | |
1440 | goto out_kfree; | |
1441 | ||
1442 | sched_exec(); | |
1443 | ||
1444 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1445 | bprm->file = file; | |
1446 | bprm->filename = filename; | |
1447 | bprm->interp = filename; | |
1448 | bprm->mm = mm_alloc(); | |
1449 | retval = -ENOMEM; | |
1450 | if (!bprm->mm) | |
1451 | goto out_file; | |
1452 | ||
1453 | retval = init_new_context(current, bprm->mm); | |
1454 | if (retval < 0) | |
1455 | goto out_mm; | |
1456 | ||
1457 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1458 | if ((retval = bprm->argc) < 0) | |
1459 | goto out_mm; | |
1460 | ||
1461 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1462 | if ((retval = bprm->envc) < 0) | |
1463 | goto out_mm; | |
1464 | ||
1465 | retval = security_bprm_alloc(bprm); | |
1466 | if (retval) | |
1467 | goto out; | |
1468 | ||
1469 | retval = prepare_binprm(bprm); | |
1470 | if (retval < 0) | |
1471 | goto out; | |
1472 | ||
1473 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1474 | if (retval < 0) | |
1475 | goto out; | |
1476 | ||
1477 | bprm->exec = bprm->p; | |
1478 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1479 | if (retval < 0) | |
1480 | goto out; | |
1481 | ||
1482 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1483 | if (retval < 0) | |
1484 | goto out; | |
1485 | ||
1486 | retval = search_binary_handler(bprm, regs); | |
1487 | if (retval >= 0) { | |
1488 | free_arg_pages(bprm); | |
1489 | ||
1490 | /* execve success */ | |
1491 | security_bprm_free(bprm); | |
1492 | kfree(bprm); | |
1493 | return retval; | |
1494 | } | |
1495 | ||
1496 | out: | |
1497 | /* Something went wrong, return the inode and free the argument pages*/ | |
1498 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1499 | struct page * page = bprm->page[i]; | |
1500 | if (page) | |
1501 | __free_page(page); | |
1502 | } | |
1503 | ||
1504 | if (bprm->security) | |
1505 | security_bprm_free(bprm); | |
1506 | ||
1507 | out_mm: | |
1508 | if (bprm->mm) | |
1509 | mmdrop(bprm->mm); | |
1510 | ||
1511 | out_file: | |
1512 | if (bprm->file) { | |
1513 | allow_write_access(bprm->file); | |
1514 | fput(bprm->file); | |
1515 | } | |
1516 | ||
1517 | out_kfree: | |
1518 | kfree(bprm); | |
1519 | ||
1520 | out_ret: | |
1521 | return retval; | |
1522 | } | |
1523 | ||
1524 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1525 | ||
1526 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1527 | ||
1528 | /* | |
1529 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1530 | * 64-bit unsigned longs. | |
1531 | */ | |
1532 | static inline | |
1533 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, | |
1534 | unsigned long *fdset) | |
1535 | { | |
1536 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1537 | if (ufdset) { | |
1538 | unsigned long odd; | |
1539 | ||
1540 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1541 | return -EFAULT; | |
1542 | ||
1543 | odd = nr & 1UL; | |
1544 | nr &= ~1UL; | |
1545 | while (nr) { | |
1546 | unsigned long h, l; | |
1547 | __get_user(l, ufdset); | |
1548 | __get_user(h, ufdset+1); | |
1549 | ufdset += 2; | |
1550 | *fdset++ = h << 32 | l; | |
1551 | nr -= 2; | |
1552 | } | |
1553 | if (odd) | |
1554 | __get_user(*fdset, ufdset); | |
1555 | } else { | |
1556 | /* Tricky, must clear full unsigned long in the | |
1557 | * kernel fdset at the end, this makes sure that | |
1558 | * actually happens. | |
1559 | */ | |
1560 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1561 | } | |
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static inline | |
1566 | void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, | |
1567 | unsigned long *fdset) | |
1568 | { | |
1569 | unsigned long odd; | |
1570 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1571 | ||
1572 | if (!ufdset) | |
1573 | return; | |
1574 | ||
1575 | odd = nr & 1UL; | |
1576 | nr &= ~1UL; | |
1577 | while (nr) { | |
1578 | unsigned long h, l; | |
1579 | l = *fdset++; | |
1580 | h = l >> 32; | |
1581 | __put_user(l, ufdset); | |
1582 | __put_user(h, ufdset+1); | |
1583 | ufdset += 2; | |
1584 | nr -= 2; | |
1585 | } | |
1586 | if (odd) | |
1587 | __put_user(*fdset, ufdset); | |
1588 | } | |
1589 | ||
1590 | ||
1591 | /* | |
1592 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1593 | * should be compared to it from time to time | |
1594 | */ | |
1595 | static void *select_bits_alloc(int size) | |
1596 | { | |
1597 | return kmalloc(6 * size, GFP_KERNEL); | |
1598 | } | |
1599 | ||
1600 | static void select_bits_free(void *bits, int size) | |
1601 | { | |
1602 | kfree(bits); | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1607 | * like to be certain this leads to no problems. So I return | |
1608 | * EINTR just for safety. | |
1609 | * | |
1610 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1611 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1612 | */ | |
1613 | #define MAX_SELECT_SECONDS \ | |
1614 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1615 | ||
1616 | asmlinkage long | |
1617 | compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, | |
1618 | compat_ulong_t __user *exp, struct compat_timeval __user *tvp) | |
1619 | { | |
1620 | fd_set_bits fds; | |
1621 | char *bits; | |
1622 | long timeout; | |
1623 | int size, max_fdset, ret = -EINVAL; | |
1624 | ||
1625 | timeout = MAX_SCHEDULE_TIMEOUT; | |
1626 | if (tvp) { | |
1627 | time_t sec, usec; | |
1628 | ||
1629 | if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) | |
1630 | || __get_user(sec, &tvp->tv_sec) | |
1631 | || __get_user(usec, &tvp->tv_usec)) { | |
1632 | ret = -EFAULT; | |
1633 | goto out_nofds; | |
1634 | } | |
1635 | ||
1636 | if (sec < 0 || usec < 0) | |
1637 | goto out_nofds; | |
1638 | ||
1639 | if ((unsigned long) sec < MAX_SELECT_SECONDS) { | |
1640 | timeout = ROUND_UP(usec, 1000000/HZ); | |
1641 | timeout += sec * (unsigned long) HZ; | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | if (n < 0) | |
1646 | goto out_nofds; | |
1647 | ||
1648 | /* max_fdset can increase, so grab it once to avoid race */ | |
1649 | max_fdset = current->files->max_fdset; | |
1650 | if (n > max_fdset) | |
1651 | n = max_fdset; | |
1652 | ||
1653 | /* | |
1654 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1655 | * since we used fdset we need to allocate memory in units of | |
1656 | * long-words. | |
1657 | */ | |
1658 | ret = -ENOMEM; | |
1659 | size = FDS_BYTES(n); | |
1660 | bits = select_bits_alloc(size); | |
1661 | if (!bits) | |
1662 | goto out_nofds; | |
1663 | fds.in = (unsigned long *) bits; | |
1664 | fds.out = (unsigned long *) (bits + size); | |
1665 | fds.ex = (unsigned long *) (bits + 2*size); | |
1666 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1667 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1668 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1669 | ||
1670 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1671 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1672 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1673 | goto out; | |
1674 | zero_fd_set(n, fds.res_in); | |
1675 | zero_fd_set(n, fds.res_out); | |
1676 | zero_fd_set(n, fds.res_ex); | |
1677 | ||
1678 | ret = do_select(n, &fds, &timeout); | |
1679 | ||
1680 | if (tvp && !(current->personality & STICKY_TIMEOUTS)) { | |
1681 | time_t sec = 0, usec = 0; | |
1682 | if (timeout) { | |
1683 | sec = timeout / HZ; | |
1684 | usec = timeout % HZ; | |
1685 | usec *= (1000000/HZ); | |
1686 | } | |
1687 | if (put_user(sec, &tvp->tv_sec) || | |
1688 | put_user(usec, &tvp->tv_usec)) | |
1689 | ret = -EFAULT; | |
1690 | } | |
1691 | ||
1692 | if (ret < 0) | |
1693 | goto out; | |
1694 | if (!ret) { | |
1695 | ret = -ERESTARTNOHAND; | |
1696 | if (signal_pending(current)) | |
1697 | goto out; | |
1698 | ret = 0; | |
1699 | } | |
1700 | ||
1701 | compat_set_fd_set(n, inp, fds.res_in); | |
1702 | compat_set_fd_set(n, outp, fds.res_out); | |
1703 | compat_set_fd_set(n, exp, fds.res_ex); | |
1704 | ||
1705 | out: | |
1706 | select_bits_free(bits, size); | |
1707 | out_nofds: | |
1708 | return ret; | |
1709 | } | |
1710 | ||
1711 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) | |
1712 | /* Stuff for NFS server syscalls... */ | |
1713 | struct compat_nfsctl_svc { | |
1714 | u16 svc32_port; | |
1715 | s32 svc32_nthreads; | |
1716 | }; | |
1717 | ||
1718 | struct compat_nfsctl_client { | |
1719 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1720 | s32 cl32_naddr; | |
1721 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1722 | s32 cl32_fhkeytype; | |
1723 | s32 cl32_fhkeylen; | |
1724 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1725 | }; | |
1726 | ||
1727 | struct compat_nfsctl_export { | |
1728 | char ex32_client[NFSCLNT_IDMAX+1]; | |
1729 | char ex32_path[NFS_MAXPATHLEN+1]; | |
1730 | compat_dev_t ex32_dev; | |
1731 | compat_ino_t ex32_ino; | |
1732 | compat_int_t ex32_flags; | |
1733 | compat_uid_t ex32_anon_uid; | |
1734 | compat_gid_t ex32_anon_gid; | |
1735 | }; | |
1736 | ||
1737 | struct compat_nfsctl_fdparm { | |
1738 | struct sockaddr gd32_addr; | |
1739 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1740 | compat_int_t gd32_version; | |
1741 | }; | |
1742 | ||
1743 | struct compat_nfsctl_fsparm { | |
1744 | struct sockaddr gd32_addr; | |
1745 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1746 | compat_int_t gd32_maxlen; | |
1747 | }; | |
1748 | ||
1749 | struct compat_nfsctl_arg { | |
1750 | compat_int_t ca32_version; /* safeguard */ | |
1751 | union { | |
1752 | struct compat_nfsctl_svc u32_svc; | |
1753 | struct compat_nfsctl_client u32_client; | |
1754 | struct compat_nfsctl_export u32_export; | |
1755 | struct compat_nfsctl_fdparm u32_getfd; | |
1756 | struct compat_nfsctl_fsparm u32_getfs; | |
1757 | } u; | |
1758 | #define ca32_svc u.u32_svc | |
1759 | #define ca32_client u.u32_client | |
1760 | #define ca32_export u.u32_export | |
1761 | #define ca32_getfd u.u32_getfd | |
1762 | #define ca32_getfs u.u32_getfs | |
1763 | }; | |
1764 | ||
1765 | union compat_nfsctl_res { | |
1766 | __u8 cr32_getfh[NFS_FHSIZE]; | |
1767 | struct knfsd_fh cr32_getfs; | |
1768 | }; | |
1769 | ||
1770 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1771 | { | |
1772 | int err; | |
1773 | ||
1774 | err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)); | |
1775 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1776 | err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port); | |
1777 | err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads); | |
1778 | return (err) ? -EFAULT : 0; | |
1779 | } | |
1780 | ||
1781 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1782 | { | |
1783 | int err; | |
1784 | ||
1785 | err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client)); | |
1786 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1787 | err |= __copy_from_user(&karg->ca_client.cl_ident[0], | |
1788 | &arg->ca32_client.cl32_ident[0], | |
1789 | NFSCLNT_IDMAX); | |
1790 | err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr); | |
1791 | err |= __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
1792 | &arg->ca32_client.cl32_addrlist[0], | |
1793 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)); | |
1794 | err |= __get_user(karg->ca_client.cl_fhkeytype, | |
1795 | &arg->ca32_client.cl32_fhkeytype); | |
1796 | err |= __get_user(karg->ca_client.cl_fhkeylen, | |
1797 | &arg->ca32_client.cl32_fhkeylen); | |
1798 | err |= __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
1799 | &arg->ca32_client.cl32_fhkey[0], | |
1800 | NFSCLNT_KEYMAX); | |
1801 | ||
1802 | return (err) ? -EFAULT : 0; | |
1803 | } | |
1804 | ||
1805 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1806 | { | |
1807 | int err; | |
1808 | ||
1809 | err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export)); | |
1810 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1811 | err |= __copy_from_user(&karg->ca_export.ex_client[0], | |
1812 | &arg->ca32_export.ex32_client[0], | |
1813 | NFSCLNT_IDMAX); | |
1814 | err |= __copy_from_user(&karg->ca_export.ex_path[0], | |
1815 | &arg->ca32_export.ex32_path[0], | |
1816 | NFS_MAXPATHLEN); | |
1817 | err |= __get_user(karg->ca_export.ex_dev, | |
1818 | &arg->ca32_export.ex32_dev); | |
1819 | err |= __get_user(karg->ca_export.ex_ino, | |
1820 | &arg->ca32_export.ex32_ino); | |
1821 | err |= __get_user(karg->ca_export.ex_flags, | |
1822 | &arg->ca32_export.ex32_flags); | |
1823 | err |= __get_user(karg->ca_export.ex_anon_uid, | |
1824 | &arg->ca32_export.ex32_anon_uid); | |
1825 | err |= __get_user(karg->ca_export.ex_anon_gid, | |
1826 | &arg->ca32_export.ex32_anon_gid); | |
1827 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); | |
1828 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
1829 | ||
1830 | return (err) ? -EFAULT : 0; | |
1831 | } | |
1832 | ||
1833 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1834 | { | |
1835 | int err; | |
1836 | ||
1837 | err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd)); | |
1838 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1839 | err |= __copy_from_user(&karg->ca_getfd.gd_addr, | |
1840 | &arg->ca32_getfd.gd32_addr, | |
1841 | (sizeof(struct sockaddr))); | |
1842 | err |= __copy_from_user(&karg->ca_getfd.gd_path, | |
1843 | &arg->ca32_getfd.gd32_path, | |
1844 | (NFS_MAXPATHLEN+1)); | |
1845 | err |= __get_user(karg->ca_getfd.gd_version, | |
1846 | &arg->ca32_getfd.gd32_version); | |
1847 | ||
1848 | return (err) ? -EFAULT : 0; | |
1849 | } | |
1850 | ||
1851 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1852 | { | |
1853 | int err; | |
1854 | ||
1855 | err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs)); | |
1856 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1857 | err |= __copy_from_user(&karg->ca_getfs.gd_addr, | |
1858 | &arg->ca32_getfs.gd32_addr, | |
1859 | (sizeof(struct sockaddr))); | |
1860 | err |= __copy_from_user(&karg->ca_getfs.gd_path, | |
1861 | &arg->ca32_getfs.gd32_path, | |
1862 | (NFS_MAXPATHLEN+1)); | |
1863 | err |= __get_user(karg->ca_getfs.gd_maxlen, | |
1864 | &arg->ca32_getfs.gd32_maxlen); | |
1865 | ||
1866 | return (err) ? -EFAULT : 0; | |
1867 | } | |
1868 | ||
1869 | /* This really doesn't need translations, we are only passing | |
1870 | * back a union which contains opaque nfs file handle data. | |
1871 | */ | |
1872 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res) | |
1873 | { | |
1874 | int err; | |
1875 | ||
1876 | err = copy_to_user(res, kres, sizeof(*res)); | |
1877 | ||
1878 | return (err) ? -EFAULT : 0; | |
1879 | } | |
1880 | ||
1881 | asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg, | |
1882 | union compat_nfsctl_res __user *res) | |
1883 | { | |
1884 | struct nfsctl_arg *karg; | |
1885 | union nfsctl_res *kres; | |
1886 | mm_segment_t oldfs; | |
1887 | int err; | |
1888 | ||
1889 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
1890 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
1891 | if(!karg || !kres) { | |
1892 | err = -ENOMEM; | |
1893 | goto done; | |
1894 | } | |
1895 | ||
1896 | switch(cmd) { | |
1897 | case NFSCTL_SVC: | |
1898 | err = compat_nfs_svc_trans(karg, arg); | |
1899 | break; | |
1900 | ||
1901 | case NFSCTL_ADDCLIENT: | |
1902 | err = compat_nfs_clnt_trans(karg, arg); | |
1903 | break; | |
1904 | ||
1905 | case NFSCTL_DELCLIENT: | |
1906 | err = compat_nfs_clnt_trans(karg, arg); | |
1907 | break; | |
1908 | ||
1909 | case NFSCTL_EXPORT: | |
1910 | case NFSCTL_UNEXPORT: | |
1911 | err = compat_nfs_exp_trans(karg, arg); | |
1912 | break; | |
1913 | ||
1914 | case NFSCTL_GETFD: | |
1915 | err = compat_nfs_getfd_trans(karg, arg); | |
1916 | break; | |
1917 | ||
1918 | case NFSCTL_GETFS: | |
1919 | err = compat_nfs_getfs_trans(karg, arg); | |
1920 | break; | |
1921 | ||
1922 | default: | |
1923 | err = -EINVAL; | |
1924 | goto done; | |
1925 | } | |
1926 | ||
1927 | oldfs = get_fs(); | |
1928 | set_fs(KERNEL_DS); | |
1929 | /* The __user pointer casts are valid because of the set_fs() */ | |
1930 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
1931 | set_fs(oldfs); | |
1932 | ||
1933 | if (err) | |
1934 | goto done; | |
1935 | ||
1936 | if((cmd == NFSCTL_GETFD) || | |
1937 | (cmd == NFSCTL_GETFS)) | |
1938 | err = compat_nfs_getfh_res_trans(kres, res); | |
1939 | ||
1940 | done: | |
1941 | kfree(karg); | |
1942 | kfree(kres); | |
1943 | return err; | |
1944 | } | |
1945 | #else /* !NFSD */ | |
1946 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
1947 | { | |
1948 | return sys_ni_syscall(); | |
1949 | } | |
1950 | #endif |