Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/fs/compat.c | |
3 | * | |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support | |
5 | * on 64 bit kernels. | |
6 | * | |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation | |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
18 | #include <linux/linkage.h> | |
19 | #include <linux/compat.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/time.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/fcntl.h> | |
24 | #include <linux/namei.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/vfs.h> | |
27 | #include <linux/ioctl32.h> | |
28 | #include <linux/ioctl.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/sockios.h> /* for SIOCDEVPRIVATE */ | |
31 | #include <linux/smb.h> | |
32 | #include <linux/smb_mount.h> | |
33 | #include <linux/ncp_mount.h> | |
9a9947bf | 34 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
35 | #include <linux/smp_lock.h> |
36 | #include <linux/syscalls.h> | |
37 | #include <linux/ctype.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/dirent.h> | |
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 | ||
9a9947bf DH |
810 | struct compat_nfs_string { |
811 | compat_uint_t len; | |
5fc3e624 | 812 | compat_uptr_t data; |
9a9947bf DH |
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; | |
5fc3e624 | 837 | compat_uptr_t host_addr; |
9a9947bf DH |
838 | compat_int_t proto; |
839 | compat_int_t auth_flavourlen; | |
5fc3e624 | 840 | compat_uptr_t auth_flavours; |
9a9947bf DH |
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 | ||
1da177e4 LT |
878 | extern int copy_mount_options (const void __user *, unsigned long *); |
879 | ||
880 | #define SMBFS_NAME "smbfs" | |
881 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 882 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
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); | |
9a9947bf DH |
918 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
919 | if (do_nfs4_super_data_conv((void *) data_page)) | |
920 | goto out4; | |
1da177e4 LT |
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 | ||
9a9947bf | 929 | out4: |
1da177e4 LT |
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 |