Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/fs/compat.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 48164 byte(s)
Tag kernel26-2.6.12-alx-r9
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/nfs4_mount.h> |
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> |
40 | #include <linux/dnotify.h> |
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> |
47 | |
48 | #include <net/sock.h> /* siocdevprivate_ioctl */ |
49 | |
50 | #include <asm/uaccess.h> |
51 | #include <asm/mmu_context.h> |
52 | #include <asm/ioctls.h> |
53 | |
54 | /* |
55 | * Not all architectures have sys_utime, so implement this in terms |
56 | * of sys_utimes. |
57 | */ |
58 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) |
59 | { |
60 | struct timeval tv[2]; |
61 | |
62 | if (t) { |
63 | if (get_user(tv[0].tv_sec, &t->actime) || |
64 | get_user(tv[1].tv_sec, &t->modtime)) |
65 | return -EFAULT; |
66 | tv[0].tv_usec = 0; |
67 | tv[1].tv_usec = 0; |
68 | } |
69 | return do_utimes(filename, t ? tv : NULL); |
70 | } |
71 | |
72 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) |
73 | { |
74 | struct timeval tv[2]; |
75 | |
76 | if (t) { |
77 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
78 | get_user(tv[0].tv_usec, &t[0].tv_usec) || |
79 | get_user(tv[1].tv_sec, &t[1].tv_sec) || |
80 | get_user(tv[1].tv_usec, &t[1].tv_usec)) |
81 | return -EFAULT; |
82 | } |
83 | return do_utimes(filename, t ? tv : NULL); |
84 | } |
85 | |
86 | asmlinkage long compat_sys_newstat(char __user * filename, |
87 | struct compat_stat __user *statbuf) |
88 | { |
89 | struct kstat stat; |
90 | int error = vfs_stat(filename, &stat); |
91 | |
92 | if (!error) |
93 | error = cp_compat_stat(&stat, statbuf); |
94 | return error; |
95 | } |
96 | |
97 | asmlinkage long compat_sys_newlstat(char __user * filename, |
98 | struct compat_stat __user *statbuf) |
99 | { |
100 | struct kstat stat; |
101 | int error = vfs_lstat(filename, &stat); |
102 | |
103 | if (!error) |
104 | error = cp_compat_stat(&stat, statbuf); |
105 | return error; |
106 | } |
107 | |
108 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
109 | struct compat_stat __user * statbuf) |
110 | { |
111 | struct kstat stat; |
112 | int error = vfs_fstat(fd, &stat); |
113 | |
114 | if (!error) |
115 | error = cp_compat_stat(&stat, statbuf); |
116 | return error; |
117 | } |
118 | |
119 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) |
120 | { |
121 | |
122 | if (sizeof ubuf->f_blocks == 4) { |
123 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & |
124 | 0xffffffff00000000ULL) |
125 | return -EOVERFLOW; |
126 | /* f_files and f_ffree may be -1; it's okay |
127 | * to stuff that into 32 bits */ |
128 | if (kbuf->f_files != 0xffffffffffffffffULL |
129 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
130 | return -EOVERFLOW; |
131 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
132 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
133 | return -EOVERFLOW; |
134 | } |
135 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
136 | __put_user(kbuf->f_type, &ubuf->f_type) || |
137 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
138 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
139 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
140 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
141 | __put_user(kbuf->f_files, &ubuf->f_files) || |
142 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
143 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
144 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
145 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
146 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || |
147 | __put_user(0, &ubuf->f_spare[0]) || |
148 | __put_user(0, &ubuf->f_spare[1]) || |
149 | __put_user(0, &ubuf->f_spare[2]) || |
150 | __put_user(0, &ubuf->f_spare[3]) || |
151 | __put_user(0, &ubuf->f_spare[4])) |
152 | return -EFAULT; |
153 | return 0; |
154 | } |
155 | |
156 | /* |
157 | * The following statfs calls are copies of code from fs/open.c and |
158 | * should be checked against those from time to time |
159 | */ |
160 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) |
161 | { |
162 | struct nameidata nd; |
163 | int error; |
164 | |
165 | error = user_path_walk(path, &nd); |
166 | if (!error) { |
167 | struct kstatfs tmp; |
168 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); |
169 | if (!error && put_compat_statfs(buf, &tmp)) |
170 | error = -EFAULT; |
171 | path_release(&nd); |
172 | } |
173 | return error; |
174 | } |
175 | |
176 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) |
177 | { |
178 | struct file * file; |
179 | struct kstatfs tmp; |
180 | int error; |
181 | |
182 | error = -EBADF; |
183 | file = fget(fd); |
184 | if (!file) |
185 | goto out; |
186 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); |
187 | if (!error && put_compat_statfs(buf, &tmp)) |
188 | error = -EFAULT; |
189 | fput(file); |
190 | out: |
191 | return error; |
192 | } |
193 | |
194 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) |
195 | { |
196 | if (sizeof ubuf->f_blocks == 4) { |
197 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & |
198 | 0xffffffff00000000ULL) |
199 | return -EOVERFLOW; |
200 | /* f_files and f_ffree may be -1; it's okay |
201 | * to stuff that into 32 bits */ |
202 | if (kbuf->f_files != 0xffffffffffffffffULL |
203 | && (kbuf->f_files & 0xffffffff00000000ULL)) |
204 | return -EOVERFLOW; |
205 | if (kbuf->f_ffree != 0xffffffffffffffffULL |
206 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) |
207 | return -EOVERFLOW; |
208 | } |
209 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || |
210 | __put_user(kbuf->f_type, &ubuf->f_type) || |
211 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || |
212 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || |
213 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || |
214 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || |
215 | __put_user(kbuf->f_files, &ubuf->f_files) || |
216 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || |
217 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || |
218 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || |
219 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || |
220 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) |
221 | return -EFAULT; |
222 | return 0; |
223 | } |
224 | |
225 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) |
226 | { |
227 | struct nameidata nd; |
228 | int error; |
229 | |
230 | if (sz != sizeof(*buf)) |
231 | return -EINVAL; |
232 | |
233 | error = user_path_walk(path, &nd); |
234 | if (!error) { |
235 | struct kstatfs tmp; |
236 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); |
237 | if (!error && put_compat_statfs64(buf, &tmp)) |
238 | error = -EFAULT; |
239 | path_release(&nd); |
240 | } |
241 | return error; |
242 | } |
243 | |
244 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) |
245 | { |
246 | struct file * file; |
247 | struct kstatfs tmp; |
248 | int error; |
249 | |
250 | if (sz != sizeof(*buf)) |
251 | return -EINVAL; |
252 | |
253 | error = -EBADF; |
254 | file = fget(fd); |
255 | if (!file) |
256 | goto out; |
257 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); |
258 | if (!error && put_compat_statfs64(buf, &tmp)) |
259 | error = -EFAULT; |
260 | fput(file); |
261 | out: |
262 | return error; |
263 | } |
264 | |
265 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ |
266 | |
267 | #define IOCTL_HASHSIZE 256 |
268 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; |
269 | static DECLARE_RWSEM(ioctl32_sem); |
270 | |
271 | extern struct ioctl_trans ioctl_start[]; |
272 | extern int ioctl_table_size; |
273 | |
274 | static inline unsigned long ioctl32_hash(unsigned long cmd) |
275 | { |
276 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; |
277 | } |
278 | |
279 | static void ioctl32_insert_translation(struct ioctl_trans *trans) |
280 | { |
281 | unsigned long hash; |
282 | struct ioctl_trans *t; |
283 | |
284 | hash = ioctl32_hash (trans->cmd); |
285 | if (!ioctl32_hash_table[hash]) |
286 | ioctl32_hash_table[hash] = trans; |
287 | else { |
288 | t = ioctl32_hash_table[hash]; |
289 | while (t->next) |
290 | t = t->next; |
291 | trans->next = NULL; |
292 | t->next = trans; |
293 | } |
294 | } |
295 | |
296 | static int __init init_sys32_ioctl(void) |
297 | { |
298 | int i; |
299 | |
300 | for (i = 0; i < ioctl_table_size; i++) { |
301 | if (ioctl_start[i].next != 0) { |
302 | printk("ioctl translation %d bad\n",i); |
303 | return -1; |
304 | } |
305 | |
306 | ioctl32_insert_translation(&ioctl_start[i]); |
307 | } |
308 | return 0; |
309 | } |
310 | |
311 | __initcall(init_sys32_ioctl); |
312 | |
313 | int register_ioctl32_conversion(unsigned int cmd, |
314 | ioctl_trans_handler_t handler) |
315 | { |
316 | struct ioctl_trans *t; |
317 | struct ioctl_trans *new_t; |
318 | unsigned long hash = ioctl32_hash(cmd); |
319 | |
320 | new_t = kmalloc(sizeof(*new_t), GFP_KERNEL); |
321 | if (!new_t) |
322 | return -ENOMEM; |
323 | |
324 | down_write(&ioctl32_sem); |
325 | for (t = ioctl32_hash_table[hash]; t; t = t->next) { |
326 | if (t->cmd == cmd) { |
327 | printk(KERN_ERR "Trying to register duplicated ioctl32 " |
328 | "handler %x\n", cmd); |
329 | up_write(&ioctl32_sem); |
330 | kfree(new_t); |
331 | return -EINVAL; |
332 | } |
333 | } |
334 | new_t->next = NULL; |
335 | new_t->cmd = cmd; |
336 | new_t->handler = handler; |
337 | ioctl32_insert_translation(new_t); |
338 | |
339 | up_write(&ioctl32_sem); |
340 | return 0; |
341 | } |
342 | EXPORT_SYMBOL(register_ioctl32_conversion); |
343 | |
344 | static inline int builtin_ioctl(struct ioctl_trans *t) |
345 | { |
346 | return t >= ioctl_start && t < (ioctl_start + ioctl_table_size); |
347 | } |
348 | |
349 | /* Problem: |
350 | This function cannot unregister duplicate ioctls, because they are not |
351 | unique. |
352 | When they happen we need to extend the prototype to pass the handler too. */ |
353 | |
354 | int unregister_ioctl32_conversion(unsigned int cmd) |
355 | { |
356 | unsigned long hash = ioctl32_hash(cmd); |
357 | struct ioctl_trans *t, *t1; |
358 | |
359 | down_write(&ioctl32_sem); |
360 | |
361 | t = ioctl32_hash_table[hash]; |
362 | if (!t) { |
363 | up_write(&ioctl32_sem); |
364 | return -EINVAL; |
365 | } |
366 | |
367 | if (t->cmd == cmd) { |
368 | if (builtin_ioctl(t)) { |
369 | printk("%p tried to unregister builtin ioctl %x\n", |
370 | __builtin_return_address(0), cmd); |
371 | } else { |
372 | ioctl32_hash_table[hash] = t->next; |
373 | up_write(&ioctl32_sem); |
374 | kfree(t); |
375 | return 0; |
376 | } |
377 | } |
378 | while (t->next) { |
379 | t1 = t->next; |
380 | if (t1->cmd == cmd) { |
381 | if (builtin_ioctl(t1)) { |
382 | printk("%p tried to unregister builtin " |
383 | "ioctl %x\n", |
384 | __builtin_return_address(0), cmd); |
385 | goto out; |
386 | } else { |
387 | t->next = t1->next; |
388 | up_write(&ioctl32_sem); |
389 | kfree(t1); |
390 | return 0; |
391 | } |
392 | } |
393 | t = t1; |
394 | } |
395 | printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n", |
396 | cmd); |
397 | out: |
398 | up_write(&ioctl32_sem); |
399 | return -EINVAL; |
400 | } |
401 | EXPORT_SYMBOL(unregister_ioctl32_conversion); |
402 | |
403 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
404 | unsigned int cmd, unsigned long arg) |
405 | { |
406 | char buf[10]; |
407 | char *fn = "?"; |
408 | char *path; |
409 | |
410 | /* find the name of the device. */ |
411 | path = (char *)__get_free_page(GFP_KERNEL); |
412 | if (path) { |
413 | fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); |
414 | if (IS_ERR(fn)) |
415 | fn = "?"; |
416 | } |
417 | |
418 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); |
419 | if (!isprint(buf[1])) |
420 | sprintf(buf, "%02x", buf[1]); |
421 | printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
422 | "cmd(%08x){%s} arg(%08x) on %s\n", |
423 | current->comm, current->pid, |
424 | (int)fd, (unsigned int)cmd, buf, |
425 | (unsigned int)arg, fn); |
426 | |
427 | if (path) |
428 | free_page((unsigned long)path); |
429 | } |
430 | |
431 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, |
432 | unsigned long arg) |
433 | { |
434 | struct file *filp; |
435 | int error = -EBADF; |
436 | struct ioctl_trans *t; |
437 | int fput_needed; |
438 | |
439 | filp = fget_light(fd, &fput_needed); |
440 | if (!filp) |
441 | goto out; |
442 | |
443 | /* RED-PEN how should LSM module know it's handling 32bit? */ |
444 | error = security_file_ioctl(filp, cmd, arg); |
445 | if (error) |
446 | goto out_fput; |
447 | |
448 | /* |
449 | * To allow the compat_ioctl handlers to be self contained |
450 | * we need to check the common ioctls here first. |
451 | * Just handle them with the standard handlers below. |
452 | */ |
453 | switch (cmd) { |
454 | case FIOCLEX: |
455 | case FIONCLEX: |
456 | case FIONBIO: |
457 | case FIOASYNC: |
458 | case FIOQSIZE: |
459 | break; |
460 | |
461 | case FIBMAP: |
462 | case FIGETBSZ: |
463 | case FIONREAD: |
464 | if (S_ISREG(filp->f_dentry->d_inode->i_mode)) |
465 | break; |
466 | /*FALL THROUGH*/ |
467 | |
468 | default: |
469 | if (filp->f_op && filp->f_op->compat_ioctl) { |
470 | error = filp->f_op->compat_ioctl(filp, cmd, arg); |
471 | if (error != -ENOIOCTLCMD) |
472 | goto out_fput; |
473 | } |
474 | |
475 | if (!filp->f_op || |
476 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) |
477 | goto do_ioctl; |
478 | break; |
479 | } |
480 | |
481 | /* When register_ioctl32_conversion is finally gone remove |
482 | this lock! -AK */ |
483 | down_read(&ioctl32_sem); |
484 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
485 | if (t->cmd == cmd) |
486 | goto found_handler; |
487 | } |
488 | up_read(&ioctl32_sem); |
489 | |
490 | if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && |
491 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
492 | error = siocdevprivate_ioctl(fd, cmd, arg); |
493 | } else { |
494 | static int count; |
495 | |
496 | if (++count <= 50) |
497 | compat_ioctl_error(filp, fd, cmd, arg); |
498 | error = -EINVAL; |
499 | } |
500 | |
501 | goto out_fput; |
502 | |
503 | found_handler: |
504 | if (t->handler) { |
505 | lock_kernel(); |
506 | error = t->handler(fd, cmd, arg, filp); |
507 | unlock_kernel(); |
508 | up_read(&ioctl32_sem); |
509 | goto out_fput; |
510 | } |
511 | |
512 | up_read(&ioctl32_sem); |
513 | do_ioctl: |
514 | error = vfs_ioctl(filp, fd, cmd, arg); |
515 | out_fput: |
516 | fput_light(filp, fput_needed); |
517 | out: |
518 | return error; |
519 | } |
520 | |
521 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
522 | { |
523 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
524 | __get_user(kfl->l_type, &ufl->l_type) || |
525 | __get_user(kfl->l_whence, &ufl->l_whence) || |
526 | __get_user(kfl->l_start, &ufl->l_start) || |
527 | __get_user(kfl->l_len, &ufl->l_len) || |
528 | __get_user(kfl->l_pid, &ufl->l_pid)) |
529 | return -EFAULT; |
530 | return 0; |
531 | } |
532 | |
533 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) |
534 | { |
535 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
536 | __put_user(kfl->l_type, &ufl->l_type) || |
537 | __put_user(kfl->l_whence, &ufl->l_whence) || |
538 | __put_user(kfl->l_start, &ufl->l_start) || |
539 | __put_user(kfl->l_len, &ufl->l_len) || |
540 | __put_user(kfl->l_pid, &ufl->l_pid)) |
541 | return -EFAULT; |
542 | return 0; |
543 | } |
544 | |
545 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 |
546 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
547 | { |
548 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || |
549 | __get_user(kfl->l_type, &ufl->l_type) || |
550 | __get_user(kfl->l_whence, &ufl->l_whence) || |
551 | __get_user(kfl->l_start, &ufl->l_start) || |
552 | __get_user(kfl->l_len, &ufl->l_len) || |
553 | __get_user(kfl->l_pid, &ufl->l_pid)) |
554 | return -EFAULT; |
555 | return 0; |
556 | } |
557 | #endif |
558 | |
559 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 |
560 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) |
561 | { |
562 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || |
563 | __put_user(kfl->l_type, &ufl->l_type) || |
564 | __put_user(kfl->l_whence, &ufl->l_whence) || |
565 | __put_user(kfl->l_start, &ufl->l_start) || |
566 | __put_user(kfl->l_len, &ufl->l_len) || |
567 | __put_user(kfl->l_pid, &ufl->l_pid)) |
568 | return -EFAULT; |
569 | return 0; |
570 | } |
571 | #endif |
572 | |
573 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, |
574 | unsigned long arg) |
575 | { |
576 | mm_segment_t old_fs; |
577 | struct flock f; |
578 | long ret; |
579 | |
580 | switch (cmd) { |
581 | case F_GETLK: |
582 | case F_SETLK: |
583 | case F_SETLKW: |
584 | ret = get_compat_flock(&f, compat_ptr(arg)); |
585 | if (ret != 0) |
586 | break; |
587 | old_fs = get_fs(); |
588 | set_fs(KERNEL_DS); |
589 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); |
590 | set_fs(old_fs); |
591 | if (cmd == F_GETLK && ret == 0) { |
592 | if ((f.l_start >= COMPAT_OFF_T_MAX) || |
593 | ((f.l_start + f.l_len) > COMPAT_OFF_T_MAX)) |
594 | ret = -EOVERFLOW; |
595 | if (ret == 0) |
596 | ret = put_compat_flock(&f, compat_ptr(arg)); |
597 | } |
598 | break; |
599 | |
600 | case F_GETLK64: |
601 | case F_SETLK64: |
602 | case F_SETLKW64: |
603 | ret = get_compat_flock64(&f, compat_ptr(arg)); |
604 | if (ret != 0) |
605 | break; |
606 | old_fs = get_fs(); |
607 | set_fs(KERNEL_DS); |
608 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : |
609 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), |
610 | (unsigned long)&f); |
611 | set_fs(old_fs); |
612 | if (cmd == F_GETLK64 && ret == 0) { |
613 | if ((f.l_start >= COMPAT_LOFF_T_MAX) || |
614 | ((f.l_start + f.l_len) > COMPAT_LOFF_T_MAX)) |
615 | ret = -EOVERFLOW; |
616 | if (ret == 0) |
617 | ret = put_compat_flock64(&f, compat_ptr(arg)); |
618 | } |
619 | break; |
620 | |
621 | default: |
622 | ret = sys_fcntl(fd, cmd, arg); |
623 | break; |
624 | } |
625 | return ret; |
626 | } |
627 | |
628 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, |
629 | unsigned long arg) |
630 | { |
631 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) |
632 | return -EINVAL; |
633 | return compat_sys_fcntl64(fd, cmd, arg); |
634 | } |
635 | |
636 | asmlinkage long |
637 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) |
638 | { |
639 | long ret; |
640 | aio_context_t ctx64; |
641 | |
642 | mm_segment_t oldfs = get_fs(); |
643 | if (unlikely(get_user(ctx64, ctx32p))) |
644 | return -EFAULT; |
645 | |
646 | set_fs(KERNEL_DS); |
647 | /* The __user pointer cast is valid because of the set_fs() */ |
648 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); |
649 | set_fs(oldfs); |
650 | /* truncating is ok because it's a user address */ |
651 | if (!ret) |
652 | ret = put_user((u32) ctx64, ctx32p); |
653 | return ret; |
654 | } |
655 | |
656 | asmlinkage long |
657 | compat_sys_io_getevents(aio_context_t ctx_id, |
658 | unsigned long min_nr, |
659 | unsigned long nr, |
660 | struct io_event __user *events, |
661 | struct compat_timespec __user *timeout) |
662 | { |
663 | long ret; |
664 | struct timespec t; |
665 | struct timespec __user *ut = NULL; |
666 | |
667 | ret = -EFAULT; |
668 | if (unlikely(!access_ok(VERIFY_WRITE, events, |
669 | nr * sizeof(struct io_event)))) |
670 | goto out; |
671 | if (timeout) { |
672 | if (get_compat_timespec(&t, timeout)) |
673 | goto out; |
674 | |
675 | ut = compat_alloc_user_space(sizeof(*ut)); |
676 | if (copy_to_user(ut, &t, sizeof(t)) ) |
677 | goto out; |
678 | } |
679 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); |
680 | out: |
681 | return ret; |
682 | } |
683 | |
684 | static inline long |
685 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) |
686 | { |
687 | compat_uptr_t uptr; |
688 | int i; |
689 | |
690 | for (i = 0; i < nr; ++i) { |
691 | if (get_user(uptr, ptr32 + i)) |
692 | return -EFAULT; |
693 | if (put_user(compat_ptr(uptr), ptr64 + i)) |
694 | return -EFAULT; |
695 | } |
696 | return 0; |
697 | } |
698 | |
699 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) |
700 | |
701 | asmlinkage long |
702 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) |
703 | { |
704 | struct iocb __user * __user *iocb64; |
705 | long ret; |
706 | |
707 | if (unlikely(nr < 0)) |
708 | return -EINVAL; |
709 | |
710 | if (nr > MAX_AIO_SUBMITS) |
711 | nr = MAX_AIO_SUBMITS; |
712 | |
713 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); |
714 | ret = copy_iocb(nr, iocb, iocb64); |
715 | if (!ret) |
716 | ret = sys_io_submit(ctx_id, nr, iocb64); |
717 | return ret; |
718 | } |
719 | |
720 | struct compat_ncp_mount_data { |
721 | compat_int_t version; |
722 | compat_uint_t ncp_fd; |
723 | compat_uid_t mounted_uid; |
724 | compat_pid_t wdog_pid; |
725 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; |
726 | compat_uint_t time_out; |
727 | compat_uint_t retry_count; |
728 | compat_uint_t flags; |
729 | compat_uid_t uid; |
730 | compat_gid_t gid; |
731 | compat_mode_t file_mode; |
732 | compat_mode_t dir_mode; |
733 | }; |
734 | |
735 | struct compat_ncp_mount_data_v4 { |
736 | compat_int_t version; |
737 | compat_ulong_t flags; |
738 | compat_ulong_t mounted_uid; |
739 | compat_long_t wdog_pid; |
740 | compat_uint_t ncp_fd; |
741 | compat_uint_t time_out; |
742 | compat_uint_t retry_count; |
743 | compat_ulong_t uid; |
744 | compat_ulong_t gid; |
745 | compat_ulong_t file_mode; |
746 | compat_ulong_t dir_mode; |
747 | }; |
748 | |
749 | static void *do_ncp_super_data_conv(void *raw_data) |
750 | { |
751 | int version = *(unsigned int *)raw_data; |
752 | |
753 | if (version == 3) { |
754 | struct compat_ncp_mount_data *c_n = raw_data; |
755 | struct ncp_mount_data *n = raw_data; |
756 | |
757 | n->dir_mode = c_n->dir_mode; |
758 | n->file_mode = c_n->file_mode; |
759 | n->gid = c_n->gid; |
760 | n->uid = c_n->uid; |
761 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); |
762 | n->wdog_pid = c_n->wdog_pid; |
763 | n->mounted_uid = c_n->mounted_uid; |
764 | } else if (version == 4) { |
765 | struct compat_ncp_mount_data_v4 *c_n = raw_data; |
766 | struct ncp_mount_data_v4 *n = raw_data; |
767 | |
768 | n->dir_mode = c_n->dir_mode; |
769 | n->file_mode = c_n->file_mode; |
770 | n->gid = c_n->gid; |
771 | n->uid = c_n->uid; |
772 | n->retry_count = c_n->retry_count; |
773 | n->time_out = c_n->time_out; |
774 | n->ncp_fd = c_n->ncp_fd; |
775 | n->wdog_pid = c_n->wdog_pid; |
776 | n->mounted_uid = c_n->mounted_uid; |
777 | n->flags = c_n->flags; |
778 | } else if (version != 5) { |
779 | return NULL; |
780 | } |
781 | |
782 | return raw_data; |
783 | } |
784 | |
785 | struct compat_smb_mount_data { |
786 | compat_int_t version; |
787 | compat_uid_t mounted_uid; |
788 | compat_uid_t uid; |
789 | compat_gid_t gid; |
790 | compat_mode_t file_mode; |
791 | compat_mode_t dir_mode; |
792 | }; |
793 | |
794 | static void *do_smb_super_data_conv(void *raw_data) |
795 | { |
796 | struct smb_mount_data *s = raw_data; |
797 | struct compat_smb_mount_data *c_s = raw_data; |
798 | |
799 | if (c_s->version != SMB_MOUNT_OLDVERSION) |
800 | goto out; |
801 | s->dir_mode = c_s->dir_mode; |
802 | s->file_mode = c_s->file_mode; |
803 | s->gid = c_s->gid; |
804 | s->uid = c_s->uid; |
805 | s->mounted_uid = c_s->mounted_uid; |
806 | out: |
807 | return raw_data; |
808 | } |
809 | |
810 | struct compat_nfs_string { |
811 | compat_uint_t len; |
812 | compat_uptr_t data; |
813 | }; |
814 | |
815 | static inline void compat_nfs_string(struct nfs_string *dst, |
816 | struct compat_nfs_string *src) |
817 | { |
818 | dst->data = compat_ptr(src->data); |
819 | dst->len = src->len; |
820 | } |
821 | |
822 | struct compat_nfs4_mount_data_v1 { |
823 | compat_int_t version; |
824 | compat_int_t flags; |
825 | compat_int_t rsize; |
826 | compat_int_t wsize; |
827 | compat_int_t timeo; |
828 | compat_int_t retrans; |
829 | compat_int_t acregmin; |
830 | compat_int_t acregmax; |
831 | compat_int_t acdirmin; |
832 | compat_int_t acdirmax; |
833 | struct compat_nfs_string client_addr; |
834 | struct compat_nfs_string mnt_path; |
835 | struct compat_nfs_string hostname; |
836 | compat_uint_t host_addrlen; |
837 | compat_uptr_t host_addr; |
838 | compat_int_t proto; |
839 | compat_int_t auth_flavourlen; |
840 | compat_uptr_t auth_flavours; |
841 | }; |
842 | |
843 | static int do_nfs4_super_data_conv(void *raw_data) |
844 | { |
845 | int version = *(compat_uint_t *) raw_data; |
846 | |
847 | if (version == 1) { |
848 | struct compat_nfs4_mount_data_v1 *raw = raw_data; |
849 | struct nfs4_mount_data *real = raw_data; |
850 | |
851 | /* copy the fields backwards */ |
852 | real->auth_flavours = compat_ptr(raw->auth_flavours); |
853 | real->auth_flavourlen = raw->auth_flavourlen; |
854 | real->proto = raw->proto; |
855 | real->host_addr = compat_ptr(raw->host_addr); |
856 | real->host_addrlen = raw->host_addrlen; |
857 | compat_nfs_string(&real->hostname, &raw->hostname); |
858 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); |
859 | compat_nfs_string(&real->client_addr, &raw->client_addr); |
860 | real->acdirmax = raw->acdirmax; |
861 | real->acdirmin = raw->acdirmin; |
862 | real->acregmax = raw->acregmax; |
863 | real->acregmin = raw->acregmin; |
864 | real->retrans = raw->retrans; |
865 | real->timeo = raw->timeo; |
866 | real->wsize = raw->wsize; |
867 | real->rsize = raw->rsize; |
868 | real->flags = raw->flags; |
869 | real->version = raw->version; |
870 | } |
871 | else { |
872 | return -EINVAL; |
873 | } |
874 | |
875 | return 0; |
876 | } |
877 | |
878 | extern int copy_mount_options (const void __user *, unsigned long *); |
879 | |
880 | #define SMBFS_NAME "smbfs" |
881 | #define NCPFS_NAME "ncpfs" |
882 | #define NFS4_NAME "nfs4" |
883 | |
884 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, |
885 | char __user * type, unsigned long flags, |
886 | void __user * data) |
887 | { |
888 | unsigned long type_page; |
889 | unsigned long data_page; |
890 | unsigned long dev_page; |
891 | char *dir_page; |
892 | int retval; |
893 | |
894 | retval = copy_mount_options (type, &type_page); |
895 | if (retval < 0) |
896 | goto out; |
897 | |
898 | dir_page = getname(dir_name); |
899 | retval = PTR_ERR(dir_page); |
900 | if (IS_ERR(dir_page)) |
901 | goto out1; |
902 | |
903 | retval = copy_mount_options (dev_name, &dev_page); |
904 | if (retval < 0) |
905 | goto out2; |
906 | |
907 | retval = copy_mount_options (data, &data_page); |
908 | if (retval < 0) |
909 | goto out3; |
910 | |
911 | retval = -EINVAL; |
912 | |
913 | if (type_page) { |
914 | if (!strcmp((char *)type_page, SMBFS_NAME)) { |
915 | do_smb_super_data_conv((void *)data_page); |
916 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { |
917 | do_ncp_super_data_conv((void *)data_page); |
918 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
919 | if (do_nfs4_super_data_conv((void *) data_page)) |
920 | goto out4; |
921 | } |
922 | } |
923 | |
924 | lock_kernel(); |
925 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, |
926 | flags, (void*)data_page); |
927 | unlock_kernel(); |
928 | |
929 | out4: |
930 | free_page(data_page); |
931 | out3: |
932 | free_page(dev_page); |
933 | out2: |
934 | putname(dir_page); |
935 | out1: |
936 | free_page(type_page); |
937 | out: |
938 | return retval; |
939 | } |
940 | |
941 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) |
942 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ |
943 | ~(sizeof(compat_long_t)-1)) |
944 | |
945 | struct compat_old_linux_dirent { |
946 | compat_ulong_t d_ino; |
947 | compat_ulong_t d_offset; |
948 | unsigned short d_namlen; |
949 | char d_name[1]; |
950 | }; |
951 | |
952 | struct compat_readdir_callback { |
953 | struct compat_old_linux_dirent __user *dirent; |
954 | int result; |
955 | }; |
956 | |
957 | static int compat_fillonedir(void *__buf, const char *name, int namlen, |
958 | loff_t offset, ino_t ino, unsigned int d_type) |
959 | { |
960 | struct compat_readdir_callback *buf = __buf; |
961 | struct compat_old_linux_dirent __user *dirent; |
962 | |
963 | if (buf->result) |
964 | return -EINVAL; |
965 | buf->result++; |
966 | dirent = buf->dirent; |
967 | if (!access_ok(VERIFY_WRITE, dirent, |
968 | (unsigned long)(dirent->d_name + namlen + 1) - |
969 | (unsigned long)dirent)) |
970 | goto efault; |
971 | if ( __put_user(ino, &dirent->d_ino) || |
972 | __put_user(offset, &dirent->d_offset) || |
973 | __put_user(namlen, &dirent->d_namlen) || |
974 | __copy_to_user(dirent->d_name, name, namlen) || |
975 | __put_user(0, dirent->d_name + namlen)) |
976 | goto efault; |
977 | return 0; |
978 | efault: |
979 | buf->result = -EFAULT; |
980 | return -EFAULT; |
981 | } |
982 | |
983 | asmlinkage long compat_sys_old_readdir(unsigned int fd, |
984 | struct compat_old_linux_dirent __user *dirent, unsigned int count) |
985 | { |
986 | int error; |
987 | struct file *file; |
988 | struct compat_readdir_callback buf; |
989 | |
990 | error = -EBADF; |
991 | file = fget(fd); |
992 | if (!file) |
993 | goto out; |
994 | |
995 | buf.result = 0; |
996 | buf.dirent = dirent; |
997 | |
998 | error = vfs_readdir(file, compat_fillonedir, &buf); |
999 | if (error >= 0) |
1000 | error = buf.result; |
1001 | |
1002 | fput(file); |
1003 | out: |
1004 | return error; |
1005 | } |
1006 | |
1007 | struct compat_linux_dirent { |
1008 | compat_ulong_t d_ino; |
1009 | compat_ulong_t d_off; |
1010 | unsigned short d_reclen; |
1011 | char d_name[1]; |
1012 | }; |
1013 | |
1014 | struct compat_getdents_callback { |
1015 | struct compat_linux_dirent __user *current_dir; |
1016 | struct compat_linux_dirent __user *previous; |
1017 | int count; |
1018 | int error; |
1019 | }; |
1020 | |
1021 | static int compat_filldir(void *__buf, const char *name, int namlen, |
1022 | loff_t offset, ino_t ino, unsigned int d_type) |
1023 | { |
1024 | struct compat_linux_dirent __user * dirent; |
1025 | struct compat_getdents_callback *buf = __buf; |
1026 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); |
1027 | |
1028 | buf->error = -EINVAL; /* only used if we fail.. */ |
1029 | if (reclen > buf->count) |
1030 | return -EINVAL; |
1031 | dirent = buf->previous; |
1032 | if (dirent) { |
1033 | if (__put_user(offset, &dirent->d_off)) |
1034 | goto efault; |
1035 | } |
1036 | dirent = buf->current_dir; |
1037 | if (__put_user(ino, &dirent->d_ino)) |
1038 | goto efault; |
1039 | if (__put_user(reclen, &dirent->d_reclen)) |
1040 | goto efault; |
1041 | if (copy_to_user(dirent->d_name, name, namlen)) |
1042 | goto efault; |
1043 | if (__put_user(0, dirent->d_name + namlen)) |
1044 | goto efault; |
1045 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) |
1046 | goto efault; |
1047 | buf->previous = dirent; |
1048 | dirent = (void __user *)dirent + reclen; |
1049 | buf->current_dir = dirent; |
1050 | buf->count -= reclen; |
1051 | return 0; |
1052 | efault: |
1053 | buf->error = -EFAULT; |
1054 | return -EFAULT; |
1055 | } |
1056 | |
1057 | asmlinkage long compat_sys_getdents(unsigned int fd, |
1058 | struct compat_linux_dirent __user *dirent, unsigned int count) |
1059 | { |
1060 | struct file * file; |
1061 | struct compat_linux_dirent __user * lastdirent; |
1062 | struct compat_getdents_callback buf; |
1063 | int error; |
1064 | |
1065 | error = -EFAULT; |
1066 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
1067 | goto out; |
1068 | |
1069 | error = -EBADF; |
1070 | file = fget(fd); |
1071 | if (!file) |
1072 | goto out; |
1073 | |
1074 | buf.current_dir = dirent; |
1075 | buf.previous = NULL; |
1076 | buf.count = count; |
1077 | buf.error = 0; |
1078 | |
1079 | error = vfs_readdir(file, compat_filldir, &buf); |
1080 | if (error < 0) |
1081 | goto out_putf; |
1082 | error = buf.error; |
1083 | lastdirent = buf.previous; |
1084 | if (lastdirent) { |
1085 | if (put_user(file->f_pos, &lastdirent->d_off)) |
1086 | error = -EFAULT; |
1087 | else |
1088 | error = count - buf.count; |
1089 | } |
1090 | |
1091 | out_putf: |
1092 | fput(file); |
1093 | out: |
1094 | return error; |
1095 | } |
1096 | |
1097 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 |
1098 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) |
1099 | |
1100 | struct compat_getdents_callback64 { |
1101 | struct linux_dirent64 __user *current_dir; |
1102 | struct linux_dirent64 __user *previous; |
1103 | int count; |
1104 | int error; |
1105 | }; |
1106 | |
1107 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, |
1108 | ino_t ino, unsigned int d_type) |
1109 | { |
1110 | struct linux_dirent64 __user *dirent; |
1111 | struct compat_getdents_callback64 *buf = __buf; |
1112 | int jj = NAME_OFFSET(dirent); |
1113 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); |
1114 | u64 off; |
1115 | |
1116 | buf->error = -EINVAL; /* only used if we fail.. */ |
1117 | if (reclen > buf->count) |
1118 | return -EINVAL; |
1119 | dirent = buf->previous; |
1120 | |
1121 | if (dirent) { |
1122 | if (__put_user_unaligned(offset, &dirent->d_off)) |
1123 | goto efault; |
1124 | } |
1125 | dirent = buf->current_dir; |
1126 | if (__put_user_unaligned(ino, &dirent->d_ino)) |
1127 | goto efault; |
1128 | off = 0; |
1129 | if (__put_user_unaligned(off, &dirent->d_off)) |
1130 | goto efault; |
1131 | if (__put_user(reclen, &dirent->d_reclen)) |
1132 | goto efault; |
1133 | if (__put_user(d_type, &dirent->d_type)) |
1134 | goto efault; |
1135 | if (copy_to_user(dirent->d_name, name, namlen)) |
1136 | goto efault; |
1137 | if (__put_user(0, dirent->d_name + namlen)) |
1138 | goto efault; |
1139 | buf->previous = dirent; |
1140 | dirent = (void __user *)dirent + reclen; |
1141 | buf->current_dir = dirent; |
1142 | buf->count -= reclen; |
1143 | return 0; |
1144 | efault: |
1145 | buf->error = -EFAULT; |
1146 | return -EFAULT; |
1147 | } |
1148 | |
1149 | asmlinkage long compat_sys_getdents64(unsigned int fd, |
1150 | struct linux_dirent64 __user * dirent, unsigned int count) |
1151 | { |
1152 | struct file * file; |
1153 | struct linux_dirent64 __user * lastdirent; |
1154 | struct compat_getdents_callback64 buf; |
1155 | int error; |
1156 | |
1157 | error = -EFAULT; |
1158 | if (!access_ok(VERIFY_WRITE, dirent, count)) |
1159 | goto out; |
1160 | |
1161 | error = -EBADF; |
1162 | file = fget(fd); |
1163 | if (!file) |
1164 | goto out; |
1165 | |
1166 | buf.current_dir = dirent; |
1167 | buf.previous = NULL; |
1168 | buf.count = count; |
1169 | buf.error = 0; |
1170 | |
1171 | error = vfs_readdir(file, compat_filldir64, &buf); |
1172 | if (error < 0) |
1173 | goto out_putf; |
1174 | error = buf.error; |
1175 | lastdirent = buf.previous; |
1176 | if (lastdirent) { |
1177 | typeof(lastdirent->d_off) d_off = file->f_pos; |
1178 | __put_user_unaligned(d_off, &lastdirent->d_off); |
1179 | error = count - buf.count; |
1180 | } |
1181 | |
1182 | out_putf: |
1183 | fput(file); |
1184 | out: |
1185 | return error; |
1186 | } |
1187 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ |
1188 | |
1189 | static ssize_t compat_do_readv_writev(int type, struct file *file, |
1190 | const struct compat_iovec __user *uvector, |
1191 | unsigned long nr_segs, loff_t *pos) |
1192 | { |
1193 | typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *); |
1194 | typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *); |
1195 | |
1196 | compat_ssize_t tot_len; |
1197 | struct iovec iovstack[UIO_FASTIOV]; |
1198 | struct iovec *iov=iovstack, *vector; |
1199 | ssize_t ret; |
1200 | int seg; |
1201 | io_fn_t fn; |
1202 | iov_fn_t fnv; |
1203 | |
1204 | /* |
1205 | * SuS says "The readv() function *may* fail if the iovcnt argument |
1206 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has |
1207 | * traditionally returned zero for zero segments, so... |
1208 | */ |
1209 | ret = 0; |
1210 | if (nr_segs == 0) |
1211 | goto out; |
1212 | |
1213 | /* |
1214 | * First get the "struct iovec" from user memory and |
1215 | * verify all the pointers |
1216 | */ |
1217 | ret = -EINVAL; |
1218 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) |
1219 | goto out; |
1220 | if (!file->f_op) |
1221 | goto out; |
1222 | if (nr_segs > UIO_FASTIOV) { |
1223 | ret = -ENOMEM; |
1224 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); |
1225 | if (!iov) |
1226 | goto out; |
1227 | } |
1228 | ret = -EFAULT; |
1229 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) |
1230 | goto out; |
1231 | |
1232 | /* |
1233 | * Single unix specification: |
1234 | * We should -EINVAL if an element length is not >= 0 and fitting an |
1235 | * ssize_t. The total length is fitting an ssize_t |
1236 | * |
1237 | * Be careful here because iov_len is a size_t not an ssize_t |
1238 | */ |
1239 | tot_len = 0; |
1240 | vector = iov; |
1241 | ret = -EINVAL; |
1242 | for (seg = 0 ; seg < nr_segs; seg++) { |
1243 | compat_ssize_t tmp = tot_len; |
1244 | compat_ssize_t len; |
1245 | compat_uptr_t buf; |
1246 | |
1247 | if (__get_user(len, &uvector->iov_len) || |
1248 | __get_user(buf, &uvector->iov_base)) { |
1249 | ret = -EFAULT; |
1250 | goto out; |
1251 | } |
1252 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ |
1253 | goto out; |
1254 | tot_len += len; |
1255 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ |
1256 | goto out; |
1257 | vector->iov_base = compat_ptr(buf); |
1258 | vector->iov_len = (compat_size_t) len; |
1259 | uvector++; |
1260 | vector++; |
1261 | } |
1262 | if (tot_len == 0) { |
1263 | ret = 0; |
1264 | goto out; |
1265 | } |
1266 | |
1267 | ret = rw_verify_area(type, file, pos, tot_len); |
1268 | if (ret) |
1269 | goto out; |
1270 | |
1271 | fnv = NULL; |
1272 | if (type == READ) { |
1273 | fn = file->f_op->read; |
1274 | fnv = file->f_op->readv; |
1275 | } else { |
1276 | fn = (io_fn_t)file->f_op->write; |
1277 | fnv = file->f_op->writev; |
1278 | } |
1279 | if (fnv) { |
1280 | ret = fnv(file, iov, nr_segs, pos); |
1281 | goto out; |
1282 | } |
1283 | |
1284 | /* Do it by hand, with file-ops */ |
1285 | ret = 0; |
1286 | vector = iov; |
1287 | while (nr_segs > 0) { |
1288 | void __user * base; |
1289 | size_t len; |
1290 | ssize_t nr; |
1291 | |
1292 | base = vector->iov_base; |
1293 | len = vector->iov_len; |
1294 | vector++; |
1295 | nr_segs--; |
1296 | |
1297 | nr = fn(file, base, len, pos); |
1298 | |
1299 | if (nr < 0) { |
1300 | if (!ret) ret = nr; |
1301 | break; |
1302 | } |
1303 | ret += nr; |
1304 | if (nr != len) |
1305 | break; |
1306 | } |
1307 | out: |
1308 | if (iov != iovstack) |
1309 | kfree(iov); |
1310 | if ((ret + (type == READ)) > 0) |
1311 | dnotify_parent(file->f_dentry, |
1312 | (type == READ) ? DN_ACCESS : DN_MODIFY); |
1313 | return ret; |
1314 | } |
1315 | |
1316 | asmlinkage ssize_t |
1317 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) |
1318 | { |
1319 | struct file *file; |
1320 | ssize_t ret = -EBADF; |
1321 | |
1322 | file = fget(fd); |
1323 | if (!file) |
1324 | return -EBADF; |
1325 | |
1326 | if (!(file->f_mode & FMODE_READ)) |
1327 | goto out; |
1328 | |
1329 | ret = -EINVAL; |
1330 | if (!file->f_op || (!file->f_op->readv && !file->f_op->read)) |
1331 | goto out; |
1332 | |
1333 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); |
1334 | |
1335 | out: |
1336 | fput(file); |
1337 | return ret; |
1338 | } |
1339 | |
1340 | asmlinkage ssize_t |
1341 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) |
1342 | { |
1343 | struct file *file; |
1344 | ssize_t ret = -EBADF; |
1345 | |
1346 | file = fget(fd); |
1347 | if (!file) |
1348 | return -EBADF; |
1349 | if (!(file->f_mode & FMODE_WRITE)) |
1350 | goto out; |
1351 | |
1352 | ret = -EINVAL; |
1353 | if (!file->f_op || (!file->f_op->writev && !file->f_op->write)) |
1354 | goto out; |
1355 | |
1356 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); |
1357 | |
1358 | out: |
1359 | fput(file); |
1360 | return ret; |
1361 | } |
1362 | |
1363 | /* |
1364 | * compat_count() counts the number of arguments/envelopes. It is basically |
1365 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv |
1366 | * and envp pointers. |
1367 | */ |
1368 | static int compat_count(compat_uptr_t __user *argv, int max) |
1369 | { |
1370 | int i = 0; |
1371 | |
1372 | if (argv != NULL) { |
1373 | for (;;) { |
1374 | compat_uptr_t p; |
1375 | |
1376 | if (get_user(p, argv)) |
1377 | return -EFAULT; |
1378 | if (!p) |
1379 | break; |
1380 | argv++; |
1381 | if(++i > max) |
1382 | return -E2BIG; |
1383 | } |
1384 | } |
1385 | return i; |
1386 | } |
1387 | |
1388 | /* |
1389 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c |
1390 | * except that it works with 32 bit argv and envp pointers. |
1391 | */ |
1392 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, |
1393 | struct linux_binprm *bprm) |
1394 | { |
1395 | struct page *kmapped_page = NULL; |
1396 | char *kaddr = NULL; |
1397 | int ret; |
1398 | |
1399 | while (argc-- > 0) { |
1400 | compat_uptr_t str; |
1401 | int len; |
1402 | unsigned long pos; |
1403 | |
1404 | if (get_user(str, argv+argc) || |
1405 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { |
1406 | ret = -EFAULT; |
1407 | goto out; |
1408 | } |
1409 | |
1410 | if (bprm->p < len) { |
1411 | ret = -E2BIG; |
1412 | goto out; |
1413 | } |
1414 | |
1415 | bprm->p -= len; |
1416 | /* XXX: add architecture specific overflow check here. */ |
1417 | pos = bprm->p; |
1418 | |
1419 | while (len > 0) { |
1420 | int i, new, err; |
1421 | int offset, bytes_to_copy; |
1422 | struct page *page; |
1423 | |
1424 | offset = pos % PAGE_SIZE; |
1425 | i = pos/PAGE_SIZE; |
1426 | page = bprm->page[i]; |
1427 | new = 0; |
1428 | if (!page) { |
1429 | page = alloc_page(GFP_HIGHUSER); |
1430 | bprm->page[i] = page; |
1431 | if (!page) { |
1432 | ret = -ENOMEM; |
1433 | goto out; |
1434 | } |
1435 | new = 1; |
1436 | } |
1437 | |
1438 | if (page != kmapped_page) { |
1439 | if (kmapped_page) |
1440 | kunmap(kmapped_page); |
1441 | kmapped_page = page; |
1442 | kaddr = kmap(kmapped_page); |
1443 | } |
1444 | if (new && offset) |
1445 | memset(kaddr, 0, offset); |
1446 | bytes_to_copy = PAGE_SIZE - offset; |
1447 | if (bytes_to_copy > len) { |
1448 | bytes_to_copy = len; |
1449 | if (new) |
1450 | memset(kaddr+offset+len, 0, |
1451 | PAGE_SIZE-offset-len); |
1452 | } |
1453 | err = copy_from_user(kaddr+offset, compat_ptr(str), |
1454 | bytes_to_copy); |
1455 | if (err) { |
1456 | ret = -EFAULT; |
1457 | goto out; |
1458 | } |
1459 | |
1460 | pos += bytes_to_copy; |
1461 | str += bytes_to_copy; |
1462 | len -= bytes_to_copy; |
1463 | } |
1464 | } |
1465 | ret = 0; |
1466 | out: |
1467 | if (kmapped_page) |
1468 | kunmap(kmapped_page); |
1469 | return ret; |
1470 | } |
1471 | |
1472 | #ifdef CONFIG_MMU |
1473 | |
1474 | #define free_arg_pages(bprm) do { } while (0) |
1475 | |
1476 | #else |
1477 | |
1478 | static inline void free_arg_pages(struct linux_binprm *bprm) |
1479 | { |
1480 | int i; |
1481 | |
1482 | for (i = 0; i < MAX_ARG_PAGES; i++) { |
1483 | if (bprm->page[i]) |
1484 | __free_page(bprm->page[i]); |
1485 | bprm->page[i] = NULL; |
1486 | } |
1487 | } |
1488 | |
1489 | #endif /* CONFIG_MMU */ |
1490 | |
1491 | /* |
1492 | * compat_do_execve() is mostly a copy of do_execve(), with the exception |
1493 | * that it processes 32 bit argv and envp pointers. |
1494 | */ |
1495 | int compat_do_execve(char * filename, |
1496 | compat_uptr_t __user *argv, |
1497 | compat_uptr_t __user *envp, |
1498 | struct pt_regs * regs) |
1499 | { |
1500 | struct linux_binprm *bprm; |
1501 | struct file *file; |
1502 | int retval; |
1503 | int i; |
1504 | |
1505 | retval = -ENOMEM; |
1506 | bprm = kmalloc(sizeof(*bprm), GFP_KERNEL); |
1507 | if (!bprm) |
1508 | goto out_ret; |
1509 | memset(bprm, 0, sizeof(*bprm)); |
1510 | |
1511 | file = open_exec(filename); |
1512 | retval = PTR_ERR(file); |
1513 | if (IS_ERR(file)) |
1514 | goto out_kfree; |
1515 | |
1516 | sched_exec(); |
1517 | |
1518 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); |
1519 | bprm->file = file; |
1520 | bprm->filename = filename; |
1521 | bprm->interp = filename; |
1522 | bprm->mm = mm_alloc(); |
1523 | retval = -ENOMEM; |
1524 | if (!bprm->mm) |
1525 | goto out_file; |
1526 | |
1527 | retval = init_new_context(current, bprm->mm); |
1528 | if (retval < 0) |
1529 | goto out_mm; |
1530 | |
1531 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); |
1532 | if ((retval = bprm->argc) < 0) |
1533 | goto out_mm; |
1534 | |
1535 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); |
1536 | if ((retval = bprm->envc) < 0) |
1537 | goto out_mm; |
1538 | |
1539 | retval = security_bprm_alloc(bprm); |
1540 | if (retval) |
1541 | goto out; |
1542 | |
1543 | retval = prepare_binprm(bprm); |
1544 | if (retval < 0) |
1545 | goto out; |
1546 | |
1547 | retval = copy_strings_kernel(1, &bprm->filename, bprm); |
1548 | if (retval < 0) |
1549 | goto out; |
1550 | |
1551 | bprm->exec = bprm->p; |
1552 | retval = compat_copy_strings(bprm->envc, envp, bprm); |
1553 | if (retval < 0) |
1554 | goto out; |
1555 | |
1556 | retval = compat_copy_strings(bprm->argc, argv, bprm); |
1557 | if (retval < 0) |
1558 | goto out; |
1559 | |
1560 | retval = search_binary_handler(bprm, regs); |
1561 | if (retval >= 0) { |
1562 | free_arg_pages(bprm); |
1563 | |
1564 | /* execve success */ |
1565 | security_bprm_free(bprm); |
1566 | kfree(bprm); |
1567 | return retval; |
1568 | } |
1569 | |
1570 | out: |
1571 | /* Something went wrong, return the inode and free the argument pages*/ |
1572 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { |
1573 | struct page * page = bprm->page[i]; |
1574 | if (page) |
1575 | __free_page(page); |
1576 | } |
1577 | |
1578 | if (bprm->security) |
1579 | security_bprm_free(bprm); |
1580 | |
1581 | out_mm: |
1582 | if (bprm->mm) |
1583 | mmdrop(bprm->mm); |
1584 | |
1585 | out_file: |
1586 | if (bprm->file) { |
1587 | allow_write_access(bprm->file); |
1588 | fput(bprm->file); |
1589 | } |
1590 | |
1591 | out_kfree: |
1592 | kfree(bprm); |
1593 | |
1594 | out_ret: |
1595 | return retval; |
1596 | } |
1597 | |
1598 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) |
1599 | |
1600 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) |
1601 | |
1602 | /* |
1603 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to |
1604 | * 64-bit unsigned longs. |
1605 | */ |
1606 | static inline |
1607 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1608 | unsigned long *fdset) |
1609 | { |
1610 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); |
1611 | if (ufdset) { |
1612 | unsigned long odd; |
1613 | |
1614 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) |
1615 | return -EFAULT; |
1616 | |
1617 | odd = nr & 1UL; |
1618 | nr &= ~1UL; |
1619 | while (nr) { |
1620 | unsigned long h, l; |
1621 | __get_user(l, ufdset); |
1622 | __get_user(h, ufdset+1); |
1623 | ufdset += 2; |
1624 | *fdset++ = h << 32 | l; |
1625 | nr -= 2; |
1626 | } |
1627 | if (odd) |
1628 | __get_user(*fdset, ufdset); |
1629 | } else { |
1630 | /* Tricky, must clear full unsigned long in the |
1631 | * kernel fdset at the end, this makes sure that |
1632 | * actually happens. |
1633 | */ |
1634 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); |
1635 | } |
1636 | return 0; |
1637 | } |
1638 | |
1639 | static inline |
1640 | void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1641 | unsigned long *fdset) |
1642 | { |
1643 | unsigned long odd; |
1644 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); |
1645 | |
1646 | if (!ufdset) |
1647 | return; |
1648 | |
1649 | odd = nr & 1UL; |
1650 | nr &= ~1UL; |
1651 | while (nr) { |
1652 | unsigned long h, l; |
1653 | l = *fdset++; |
1654 | h = l >> 32; |
1655 | __put_user(l, ufdset); |
1656 | __put_user(h, ufdset+1); |
1657 | ufdset += 2; |
1658 | nr -= 2; |
1659 | } |
1660 | if (odd) |
1661 | __put_user(*fdset, ufdset); |
1662 | } |
1663 | |
1664 | |
1665 | /* |
1666 | * This is a virtual copy of sys_select from fs/select.c and probably |
1667 | * should be compared to it from time to time |
1668 | */ |
1669 | static void *select_bits_alloc(int size) |
1670 | { |
1671 | return kmalloc(6 * size, GFP_KERNEL); |
1672 | } |
1673 | |
1674 | static void select_bits_free(void *bits, int size) |
1675 | { |
1676 | kfree(bits); |
1677 | } |
1678 | |
1679 | /* |
1680 | * We can actually return ERESTARTSYS instead of EINTR, but I'd |
1681 | * like to be certain this leads to no problems. So I return |
1682 | * EINTR just for safety. |
1683 | * |
1684 | * Update: ERESTARTSYS breaks at least the xview clock binary, so |
1685 | * I'm trying ERESTARTNOHAND which restart only when you want to. |
1686 | */ |
1687 | #define MAX_SELECT_SECONDS \ |
1688 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) |
1689 | |
1690 | asmlinkage long |
1691 | compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, |
1692 | compat_ulong_t __user *exp, struct compat_timeval __user *tvp) |
1693 | { |
1694 | fd_set_bits fds; |
1695 | char *bits; |
1696 | long timeout; |
1697 | int size, max_fdset, ret = -EINVAL; |
1698 | |
1699 | timeout = MAX_SCHEDULE_TIMEOUT; |
1700 | if (tvp) { |
1701 | time_t sec, usec; |
1702 | |
1703 | if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) |
1704 | || __get_user(sec, &tvp->tv_sec) |
1705 | || __get_user(usec, &tvp->tv_usec)) { |
1706 | ret = -EFAULT; |
1707 | goto out_nofds; |
1708 | } |
1709 | |
1710 | if (sec < 0 || usec < 0) |
1711 | goto out_nofds; |
1712 | |
1713 | if ((unsigned long) sec < MAX_SELECT_SECONDS) { |
1714 | timeout = ROUND_UP(usec, 1000000/HZ); |
1715 | timeout += sec * (unsigned long) HZ; |
1716 | } |
1717 | } |
1718 | |
1719 | if (n < 0) |
1720 | goto out_nofds; |
1721 | |
1722 | /* max_fdset can increase, so grab it once to avoid race */ |
1723 | max_fdset = current->files->max_fdset; |
1724 | if (n > max_fdset) |
1725 | n = max_fdset; |
1726 | |
1727 | /* |
1728 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), |
1729 | * since we used fdset we need to allocate memory in units of |
1730 | * long-words. |
1731 | */ |
1732 | ret = -ENOMEM; |
1733 | size = FDS_BYTES(n); |
1734 | bits = select_bits_alloc(size); |
1735 | if (!bits) |
1736 | goto out_nofds; |
1737 | fds.in = (unsigned long *) bits; |
1738 | fds.out = (unsigned long *) (bits + size); |
1739 | fds.ex = (unsigned long *) (bits + 2*size); |
1740 | fds.res_in = (unsigned long *) (bits + 3*size); |
1741 | fds.res_out = (unsigned long *) (bits + 4*size); |
1742 | fds.res_ex = (unsigned long *) (bits + 5*size); |
1743 | |
1744 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || |
1745 | (ret = compat_get_fd_set(n, outp, fds.out)) || |
1746 | (ret = compat_get_fd_set(n, exp, fds.ex))) |
1747 | goto out; |
1748 | zero_fd_set(n, fds.res_in); |
1749 | zero_fd_set(n, fds.res_out); |
1750 | zero_fd_set(n, fds.res_ex); |
1751 | |
1752 | ret = do_select(n, &fds, &timeout); |
1753 | |
1754 | if (tvp && !(current->personality & STICKY_TIMEOUTS)) { |
1755 | time_t sec = 0, usec = 0; |
1756 | if (timeout) { |
1757 | sec = timeout / HZ; |
1758 | usec = timeout % HZ; |
1759 | usec *= (1000000/HZ); |
1760 | } |
1761 | if (put_user(sec, &tvp->tv_sec) || |
1762 | put_user(usec, &tvp->tv_usec)) |
1763 | ret = -EFAULT; |
1764 | } |
1765 | |
1766 | if (ret < 0) |
1767 | goto out; |
1768 | if (!ret) { |
1769 | ret = -ERESTARTNOHAND; |
1770 | if (signal_pending(current)) |
1771 | goto out; |
1772 | ret = 0; |
1773 | } |
1774 | |
1775 | compat_set_fd_set(n, inp, fds.res_in); |
1776 | compat_set_fd_set(n, outp, fds.res_out); |
1777 | compat_set_fd_set(n, exp, fds.res_ex); |
1778 | |
1779 | out: |
1780 | select_bits_free(bits, size); |
1781 | out_nofds: |
1782 | return ret; |
1783 | } |
1784 | |
1785 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1786 | /* Stuff for NFS server syscalls... */ |
1787 | struct compat_nfsctl_svc { |
1788 | u16 svc32_port; |
1789 | s32 svc32_nthreads; |
1790 | }; |
1791 | |
1792 | struct compat_nfsctl_client { |
1793 | s8 cl32_ident[NFSCLNT_IDMAX+1]; |
1794 | s32 cl32_naddr; |
1795 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; |
1796 | s32 cl32_fhkeytype; |
1797 | s32 cl32_fhkeylen; |
1798 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; |
1799 | }; |
1800 | |
1801 | struct compat_nfsctl_export { |
1802 | char ex32_client[NFSCLNT_IDMAX+1]; |
1803 | char ex32_path[NFS_MAXPATHLEN+1]; |
1804 | compat_dev_t ex32_dev; |
1805 | compat_ino_t ex32_ino; |
1806 | compat_int_t ex32_flags; |
1807 | compat_uid_t ex32_anon_uid; |
1808 | compat_gid_t ex32_anon_gid; |
1809 | }; |
1810 | |
1811 | struct compat_nfsctl_fdparm { |
1812 | struct sockaddr gd32_addr; |
1813 | s8 gd32_path[NFS_MAXPATHLEN+1]; |
1814 | compat_int_t gd32_version; |
1815 | }; |
1816 | |
1817 | struct compat_nfsctl_fsparm { |
1818 | struct sockaddr gd32_addr; |
1819 | s8 gd32_path[NFS_MAXPATHLEN+1]; |
1820 | compat_int_t gd32_maxlen; |
1821 | }; |
1822 | |
1823 | struct compat_nfsctl_arg { |
1824 | compat_int_t ca32_version; /* safeguard */ |
1825 | union { |
1826 | struct compat_nfsctl_svc u32_svc; |
1827 | struct compat_nfsctl_client u32_client; |
1828 | struct compat_nfsctl_export u32_export; |
1829 | struct compat_nfsctl_fdparm u32_getfd; |
1830 | struct compat_nfsctl_fsparm u32_getfs; |
1831 | } u; |
1832 | #define ca32_svc u.u32_svc |
1833 | #define ca32_client u.u32_client |
1834 | #define ca32_export u.u32_export |
1835 | #define ca32_getfd u.u32_getfd |
1836 | #define ca32_getfs u.u32_getfs |
1837 | }; |
1838 | |
1839 | union compat_nfsctl_res { |
1840 | __u8 cr32_getfh[NFS_FHSIZE]; |
1841 | struct knfsd_fh cr32_getfs; |
1842 | }; |
1843 | |
1844 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) |
1845 | { |
1846 | int err; |
1847 | |
1848 | err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)); |
1849 | err |= get_user(karg->ca_version, &arg->ca32_version); |
1850 | err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port); |
1851 | err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads); |
1852 | return (err) ? -EFAULT : 0; |
1853 | } |
1854 | |
1855 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) |
1856 | { |
1857 | int err; |
1858 | |
1859 | err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client)); |
1860 | err |= get_user(karg->ca_version, &arg->ca32_version); |
1861 | err |= __copy_from_user(&karg->ca_client.cl_ident[0], |
1862 | &arg->ca32_client.cl32_ident[0], |
1863 | NFSCLNT_IDMAX); |
1864 | err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr); |
1865 | err |= __copy_from_user(&karg->ca_client.cl_addrlist[0], |
1866 | &arg->ca32_client.cl32_addrlist[0], |
1867 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)); |
1868 | err |= __get_user(karg->ca_client.cl_fhkeytype, |
1869 | &arg->ca32_client.cl32_fhkeytype); |
1870 | err |= __get_user(karg->ca_client.cl_fhkeylen, |
1871 | &arg->ca32_client.cl32_fhkeylen); |
1872 | err |= __copy_from_user(&karg->ca_client.cl_fhkey[0], |
1873 | &arg->ca32_client.cl32_fhkey[0], |
1874 | NFSCLNT_KEYMAX); |
1875 | |
1876 | return (err) ? -EFAULT : 0; |
1877 | } |
1878 | |
1879 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) |
1880 | { |
1881 | int err; |
1882 | |
1883 | err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export)); |
1884 | err |= get_user(karg->ca_version, &arg->ca32_version); |
1885 | err |= __copy_from_user(&karg->ca_export.ex_client[0], |
1886 | &arg->ca32_export.ex32_client[0], |
1887 | NFSCLNT_IDMAX); |
1888 | err |= __copy_from_user(&karg->ca_export.ex_path[0], |
1889 | &arg->ca32_export.ex32_path[0], |
1890 | NFS_MAXPATHLEN); |
1891 | err |= __get_user(karg->ca_export.ex_dev, |
1892 | &arg->ca32_export.ex32_dev); |
1893 | err |= __get_user(karg->ca_export.ex_ino, |
1894 | &arg->ca32_export.ex32_ino); |
1895 | err |= __get_user(karg->ca_export.ex_flags, |
1896 | &arg->ca32_export.ex32_flags); |
1897 | err |= __get_user(karg->ca_export.ex_anon_uid, |
1898 | &arg->ca32_export.ex32_anon_uid); |
1899 | err |= __get_user(karg->ca_export.ex_anon_gid, |
1900 | &arg->ca32_export.ex32_anon_gid); |
1901 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
1902 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); |
1903 | |
1904 | return (err) ? -EFAULT : 0; |
1905 | } |
1906 | |
1907 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) |
1908 | { |
1909 | int err; |
1910 | |
1911 | err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd)); |
1912 | err |= get_user(karg->ca_version, &arg->ca32_version); |
1913 | err |= __copy_from_user(&karg->ca_getfd.gd_addr, |
1914 | &arg->ca32_getfd.gd32_addr, |
1915 | (sizeof(struct sockaddr))); |
1916 | err |= __copy_from_user(&karg->ca_getfd.gd_path, |
1917 | &arg->ca32_getfd.gd32_path, |
1918 | (NFS_MAXPATHLEN+1)); |
1919 | err |= __get_user(karg->ca_getfd.gd_version, |
1920 | &arg->ca32_getfd.gd32_version); |
1921 | |
1922 | return (err) ? -EFAULT : 0; |
1923 | } |
1924 | |
1925 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) |
1926 | { |
1927 | int err; |
1928 | |
1929 | err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs)); |
1930 | err |= get_user(karg->ca_version, &arg->ca32_version); |
1931 | err |= __copy_from_user(&karg->ca_getfs.gd_addr, |
1932 | &arg->ca32_getfs.gd32_addr, |
1933 | (sizeof(struct sockaddr))); |
1934 | err |= __copy_from_user(&karg->ca_getfs.gd_path, |
1935 | &arg->ca32_getfs.gd32_path, |
1936 | (NFS_MAXPATHLEN+1)); |
1937 | err |= __get_user(karg->ca_getfs.gd_maxlen, |
1938 | &arg->ca32_getfs.gd32_maxlen); |
1939 | |
1940 | return (err) ? -EFAULT : 0; |
1941 | } |
1942 | |
1943 | /* This really doesn't need translations, we are only passing |
1944 | * back a union which contains opaque nfs file handle data. |
1945 | */ |
1946 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res) |
1947 | { |
1948 | int err; |
1949 | |
1950 | err = copy_to_user(res, kres, sizeof(*res)); |
1951 | |
1952 | return (err) ? -EFAULT : 0; |
1953 | } |
1954 | |
1955 | asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg, |
1956 | union compat_nfsctl_res __user *res) |
1957 | { |
1958 | struct nfsctl_arg *karg; |
1959 | union nfsctl_res *kres; |
1960 | mm_segment_t oldfs; |
1961 | int err; |
1962 | |
1963 | karg = kmalloc(sizeof(*karg), GFP_USER); |
1964 | kres = kmalloc(sizeof(*kres), GFP_USER); |
1965 | if(!karg || !kres) { |
1966 | err = -ENOMEM; |
1967 | goto done; |
1968 | } |
1969 | |
1970 | switch(cmd) { |
1971 | case NFSCTL_SVC: |
1972 | err = compat_nfs_svc_trans(karg, arg); |
1973 | break; |
1974 | |
1975 | case NFSCTL_ADDCLIENT: |
1976 | err = compat_nfs_clnt_trans(karg, arg); |
1977 | break; |
1978 | |
1979 | case NFSCTL_DELCLIENT: |
1980 | err = compat_nfs_clnt_trans(karg, arg); |
1981 | break; |
1982 | |
1983 | case NFSCTL_EXPORT: |
1984 | case NFSCTL_UNEXPORT: |
1985 | err = compat_nfs_exp_trans(karg, arg); |
1986 | break; |
1987 | |
1988 | case NFSCTL_GETFD: |
1989 | err = compat_nfs_getfd_trans(karg, arg); |
1990 | break; |
1991 | |
1992 | case NFSCTL_GETFS: |
1993 | err = compat_nfs_getfs_trans(karg, arg); |
1994 | break; |
1995 | |
1996 | default: |
1997 | err = -EINVAL; |
1998 | goto done; |
1999 | } |
2000 | |
2001 | oldfs = get_fs(); |
2002 | set_fs(KERNEL_DS); |
2003 | /* The __user pointer casts are valid because of the set_fs() */ |
2004 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); |
2005 | set_fs(oldfs); |
2006 | |
2007 | if (err) |
2008 | goto done; |
2009 | |
2010 | if((cmd == NFSCTL_GETFD) || |
2011 | (cmd == NFSCTL_GETFS)) |
2012 | err = compat_nfs_getfh_res_trans(kres, res); |
2013 | |
2014 | done: |
2015 | kfree(karg); |
2016 | kfree(kres); |
2017 | return err; |
2018 | } |
2019 | #else /* !NFSD */ |
2020 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) |
2021 | { |
2022 | return sys_ni_syscall(); |
2023 | } |
2024 | #endif |