]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/compat.c | |
3 | * | |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support | |
5 | * on 64 bit kernels. | |
6 | * | |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation | |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
022a1692 | 18 | #include <linux/kernel.h> |
1da177e4 LT |
19 | #include <linux/linkage.h> |
20 | #include <linux/compat.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/time.h> | |
23 | #include <linux/fs.h> | |
24 | #include <linux/fcntl.h> | |
25 | #include <linux/namei.h> | |
26 | #include <linux/file.h> | |
27 | #include <linux/vfs.h> | |
28 | #include <linux/ioctl32.h> | |
29 | #include <linux/ioctl.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/sockios.h> /* for SIOCDEVPRIVATE */ | |
32 | #include <linux/smb.h> | |
33 | #include <linux/smb_mount.h> | |
34 | #include <linux/ncp_mount.h> | |
9a9947bf | 35 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
36 | #include <linux/smp_lock.h> |
37 | #include <linux/syscalls.h> | |
38 | #include <linux/ctype.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/dirent.h> | |
0eeca283 | 41 | #include <linux/fsnotify.h> |
1da177e4 LT |
42 | #include <linux/highuid.h> |
43 | #include <linux/sunrpc/svc.h> | |
44 | #include <linux/nfsd/nfsd.h> | |
45 | #include <linux/nfsd/syscall.h> | |
46 | #include <linux/personality.h> | |
47 | #include <linux/rwsem.h> | |
8f0ab514 | 48 | #include <linux/tsacct_kern.h> |
a1f8e7f7 | 49 | #include <linux/highmem.h> |
bd01f843 | 50 | #include <linux/poll.h> |
4a805e86 | 51 | #include <linux/mm.h> |
f6dfb4fd | 52 | #include <linux/eventpoll.h> |
1da177e4 LT |
53 | |
54 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
55 | ||
56 | #include <asm/uaccess.h> | |
57 | #include <asm/mmu_context.h> | |
58 | #include <asm/ioctls.h> | |
07f3f05c | 59 | #include "internal.h" |
9f72949f | 60 | |
bebfa101 AK |
61 | int compat_log = 1; |
62 | ||
63 | int compat_printk(const char *fmt, ...) | |
64 | { | |
65 | va_list ap; | |
66 | int ret; | |
67 | if (!compat_log) | |
68 | return 0; | |
69 | va_start(ap, fmt); | |
70 | ret = vprintk(fmt, ap); | |
71 | va_end(ap); | |
72 | return ret; | |
73 | } | |
74 | ||
ee0b3e67 BP |
75 | #include "read_write.h" |
76 | ||
1da177e4 LT |
77 | /* |
78 | * Not all architectures have sys_utime, so implement this in terms | |
79 | * of sys_utimes. | |
80 | */ | |
81 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
82 | { | |
83 | struct timeval tv[2]; | |
84 | ||
85 | if (t) { | |
86 | if (get_user(tv[0].tv_sec, &t->actime) || | |
87 | get_user(tv[1].tv_sec, &t->modtime)) | |
88 | return -EFAULT; | |
89 | tv[0].tv_usec = 0; | |
90 | tv[1].tv_usec = 0; | |
91 | } | |
5590ff0d | 92 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL); |
1da177e4 LT |
93 | } |
94 | ||
9ad11ab4 | 95 | asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 LT |
96 | { |
97 | struct timeval tv[2]; | |
98 | ||
9ad11ab4 | 99 | if (t) { |
1da177e4 LT |
100 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || |
101 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
102 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
103 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
9ad11ab4 SR |
104 | return -EFAULT; |
105 | } | |
5590ff0d UD |
106 | return do_utimes(dfd, filename, t ? tv : NULL); |
107 | } | |
108 | ||
109 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
110 | { | |
111 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
112 | } |
113 | ||
114 | asmlinkage long compat_sys_newstat(char __user * filename, | |
115 | struct compat_stat __user *statbuf) | |
116 | { | |
117 | struct kstat stat; | |
5590ff0d | 118 | int error = vfs_stat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
119 | |
120 | if (!error) | |
121 | error = cp_compat_stat(&stat, statbuf); | |
122 | return error; | |
123 | } | |
124 | ||
125 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
126 | struct compat_stat __user *statbuf) | |
127 | { | |
128 | struct kstat stat; | |
5590ff0d | 129 | int error = vfs_lstat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
130 | |
131 | if (!error) | |
132 | error = cp_compat_stat(&stat, statbuf); | |
133 | return error; | |
134 | } | |
135 | ||
82d821dd | 136 | #ifndef __ARCH_WANT_STAT64 |
9ad11ab4 | 137 | asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename, |
5590ff0d UD |
138 | struct compat_stat __user *statbuf, int flag) |
139 | { | |
140 | struct kstat stat; | |
141 | int error = -EINVAL; | |
142 | ||
143 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
144 | goto out; | |
145 | ||
146 | if (flag & AT_SYMLINK_NOFOLLOW) | |
147 | error = vfs_lstat_fd(dfd, filename, &stat); | |
148 | else | |
149 | error = vfs_stat_fd(dfd, filename, &stat); | |
150 | ||
151 | if (!error) | |
152 | error = cp_compat_stat(&stat, statbuf); | |
153 | ||
154 | out: | |
155 | return error; | |
156 | } | |
82d821dd | 157 | #endif |
5590ff0d | 158 | |
1da177e4 LT |
159 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
160 | struct compat_stat __user * statbuf) | |
161 | { | |
162 | struct kstat stat; | |
163 | int error = vfs_fstat(fd, &stat); | |
164 | ||
165 | if (!error) | |
166 | error = cp_compat_stat(&stat, statbuf); | |
167 | return error; | |
168 | } | |
169 | ||
170 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
171 | { | |
172 | ||
173 | if (sizeof ubuf->f_blocks == 4) { | |
174 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
175 | 0xffffffff00000000ULL) | |
176 | return -EOVERFLOW; | |
177 | /* f_files and f_ffree may be -1; it's okay | |
178 | * to stuff that into 32 bits */ | |
179 | if (kbuf->f_files != 0xffffffffffffffffULL | |
180 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
181 | return -EOVERFLOW; | |
182 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
183 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
184 | return -EOVERFLOW; | |
185 | } | |
186 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
187 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
188 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
189 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
190 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
191 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
192 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
193 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
194 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
195 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
196 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
197 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
198 | __put_user(0, &ubuf->f_spare[0]) || | |
199 | __put_user(0, &ubuf->f_spare[1]) || | |
200 | __put_user(0, &ubuf->f_spare[2]) || | |
201 | __put_user(0, &ubuf->f_spare[3]) || | |
202 | __put_user(0, &ubuf->f_spare[4])) | |
203 | return -EFAULT; | |
204 | return 0; | |
205 | } | |
206 | ||
207 | /* | |
208 | * The following statfs calls are copies of code from fs/open.c and | |
209 | * should be checked against those from time to time | |
210 | */ | |
211 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
212 | { | |
213 | struct nameidata nd; | |
214 | int error; | |
215 | ||
216 | error = user_path_walk(path, &nd); | |
217 | if (!error) { | |
218 | struct kstatfs tmp; | |
726c3342 | 219 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
220 | if (!error) |
221 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
222 | path_release(&nd); |
223 | } | |
224 | return error; | |
225 | } | |
226 | ||
227 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
228 | { | |
229 | struct file * file; | |
230 | struct kstatfs tmp; | |
231 | int error; | |
232 | ||
233 | error = -EBADF; | |
234 | file = fget(fd); | |
235 | if (!file) | |
236 | goto out; | |
0f7fc9e4 | 237 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
238 | if (!error) |
239 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
240 | fput(file); |
241 | out: | |
242 | return error; | |
243 | } | |
244 | ||
245 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
246 | { | |
247 | if (sizeof ubuf->f_blocks == 4) { | |
248 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
249 | 0xffffffff00000000ULL) | |
250 | return -EOVERFLOW; | |
251 | /* f_files and f_ffree may be -1; it's okay | |
252 | * to stuff that into 32 bits */ | |
253 | if (kbuf->f_files != 0xffffffffffffffffULL | |
254 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
255 | return -EOVERFLOW; | |
256 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
257 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
258 | return -EOVERFLOW; | |
259 | } | |
260 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
261 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
262 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
263 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
264 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
265 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
266 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
267 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
268 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
269 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
270 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
271 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
272 | return -EFAULT; | |
273 | return 0; | |
274 | } | |
275 | ||
276 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
277 | { | |
278 | struct nameidata nd; | |
279 | int error; | |
280 | ||
281 | if (sz != sizeof(*buf)) | |
282 | return -EINVAL; | |
283 | ||
284 | error = user_path_walk(path, &nd); | |
285 | if (!error) { | |
286 | struct kstatfs tmp; | |
726c3342 | 287 | error = vfs_statfs(nd.dentry, &tmp); |
86e07ce7 DG |
288 | if (!error) |
289 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
290 | path_release(&nd); |
291 | } | |
292 | return error; | |
293 | } | |
294 | ||
295 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
296 | { | |
297 | struct file * file; | |
298 | struct kstatfs tmp; | |
299 | int error; | |
300 | ||
301 | if (sz != sizeof(*buf)) | |
302 | return -EINVAL; | |
303 | ||
304 | error = -EBADF; | |
305 | file = fget(fd); | |
306 | if (!file) | |
307 | goto out; | |
0f7fc9e4 | 308 | error = vfs_statfs(file->f_path.dentry, &tmp); |
86e07ce7 DG |
309 | if (!error) |
310 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
311 | fput(file); |
312 | out: | |
313 | return error; | |
314 | } | |
315 | ||
316 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
317 | ||
318 | #define IOCTL_HASHSIZE 256 | |
319 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
1da177e4 | 320 | |
1da177e4 LT |
321 | static inline unsigned long ioctl32_hash(unsigned long cmd) |
322 | { | |
323 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
324 | } | |
325 | ||
326 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
327 | { | |
328 | unsigned long hash; | |
329 | struct ioctl_trans *t; | |
330 | ||
331 | hash = ioctl32_hash (trans->cmd); | |
332 | if (!ioctl32_hash_table[hash]) | |
333 | ioctl32_hash_table[hash] = trans; | |
334 | else { | |
335 | t = ioctl32_hash_table[hash]; | |
336 | while (t->next) | |
337 | t = t->next; | |
338 | trans->next = NULL; | |
339 | t->next = trans; | |
340 | } | |
341 | } | |
342 | ||
343 | static int __init init_sys32_ioctl(void) | |
344 | { | |
345 | int i; | |
346 | ||
347 | for (i = 0; i < ioctl_table_size; i++) { | |
348 | if (ioctl_start[i].next != 0) { | |
349 | printk("ioctl translation %d bad\n",i); | |
350 | return -1; | |
351 | } | |
352 | ||
353 | ioctl32_insert_translation(&ioctl_start[i]); | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | __initcall(init_sys32_ioctl); | |
359 | ||
1da177e4 LT |
360 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
361 | unsigned int cmd, unsigned long arg) | |
362 | { | |
363 | char buf[10]; | |
364 | char *fn = "?"; | |
365 | char *path; | |
366 | ||
367 | /* find the name of the device. */ | |
368 | path = (char *)__get_free_page(GFP_KERNEL); | |
369 | if (path) { | |
0f7fc9e4 | 370 | fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE); |
1da177e4 LT |
371 | if (IS_ERR(fn)) |
372 | fn = "?"; | |
373 | } | |
374 | ||
a106009b | 375 | sprintf(buf,"'%c'", (cmd>>_IOC_TYPESHIFT) & _IOC_TYPEMASK); |
1da177e4 LT |
376 | if (!isprint(buf[1])) |
377 | sprintf(buf, "%02x", buf[1]); | |
bebfa101 | 378 | compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " |
a106009b | 379 | "cmd(%08x){t:%s;sz:%u} arg(%08x) on %s\n", |
1da177e4 LT |
380 | current->comm, current->pid, |
381 | (int)fd, (unsigned int)cmd, buf, | |
a106009b | 382 | (cmd >> _IOC_SIZESHIFT) & _IOC_SIZEMASK, |
1da177e4 LT |
383 | (unsigned int)arg, fn); |
384 | ||
385 | if (path) | |
386 | free_page((unsigned long)path); | |
387 | } | |
388 | ||
389 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
390 | unsigned long arg) | |
391 | { | |
392 | struct file *filp; | |
393 | int error = -EBADF; | |
394 | struct ioctl_trans *t; | |
395 | int fput_needed; | |
396 | ||
397 | filp = fget_light(fd, &fput_needed); | |
398 | if (!filp) | |
399 | goto out; | |
400 | ||
401 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
402 | error = security_file_ioctl(filp, cmd, arg); | |
403 | if (error) | |
404 | goto out_fput; | |
405 | ||
406 | /* | |
407 | * To allow the compat_ioctl handlers to be self contained | |
408 | * we need to check the common ioctls here first. | |
409 | * Just handle them with the standard handlers below. | |
410 | */ | |
411 | switch (cmd) { | |
412 | case FIOCLEX: | |
413 | case FIONCLEX: | |
414 | case FIONBIO: | |
415 | case FIOASYNC: | |
416 | case FIOQSIZE: | |
417 | break; | |
418 | ||
419 | case FIBMAP: | |
420 | case FIGETBSZ: | |
421 | case FIONREAD: | |
0f7fc9e4 | 422 | if (S_ISREG(filp->f_path.dentry->d_inode->i_mode)) |
1da177e4 LT |
423 | break; |
424 | /*FALL THROUGH*/ | |
425 | ||
426 | default: | |
427 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
428 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
429 | if (error != -ENOIOCTLCMD) | |
430 | goto out_fput; | |
431 | } | |
432 | ||
433 | if (!filp->f_op || | |
434 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
435 | goto do_ioctl; | |
436 | break; | |
437 | } | |
438 | ||
1da177e4 LT |
439 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
440 | if (t->cmd == cmd) | |
441 | goto found_handler; | |
442 | } | |
1da177e4 | 443 | |
0f7fc9e4 | 444 | if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) && |
1da177e4 LT |
445 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
446 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
447 | } else { | |
448 | static int count; | |
449 | ||
450 | if (++count <= 50) | |
451 | compat_ioctl_error(filp, fd, cmd, arg); | |
452 | error = -EINVAL; | |
453 | } | |
454 | ||
455 | goto out_fput; | |
456 | ||
457 | found_handler: | |
458 | if (t->handler) { | |
459 | lock_kernel(); | |
460 | error = t->handler(fd, cmd, arg, filp); | |
461 | unlock_kernel(); | |
1da177e4 LT |
462 | goto out_fput; |
463 | } | |
464 | ||
1da177e4 LT |
465 | do_ioctl: |
466 | error = vfs_ioctl(filp, fd, cmd, arg); | |
467 | out_fput: | |
468 | fput_light(filp, fput_needed); | |
469 | out: | |
470 | return error; | |
471 | } | |
472 | ||
473 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
474 | { | |
475 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
476 | __get_user(kfl->l_type, &ufl->l_type) || | |
477 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
478 | __get_user(kfl->l_start, &ufl->l_start) || | |
479 | __get_user(kfl->l_len, &ufl->l_len) || | |
480 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
481 | return -EFAULT; | |
482 | return 0; | |
483 | } | |
484 | ||
485 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
486 | { | |
487 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
488 | __put_user(kfl->l_type, &ufl->l_type) || | |
489 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
490 | __put_user(kfl->l_start, &ufl->l_start) || | |
491 | __put_user(kfl->l_len, &ufl->l_len) || | |
492 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
493 | return -EFAULT; | |
494 | return 0; | |
495 | } | |
496 | ||
497 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
498 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
499 | { | |
500 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
501 | __get_user(kfl->l_type, &ufl->l_type) || | |
502 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
503 | __get_user(kfl->l_start, &ufl->l_start) || | |
504 | __get_user(kfl->l_len, &ufl->l_len) || | |
505 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
506 | return -EFAULT; | |
507 | return 0; | |
508 | } | |
509 | #endif | |
510 | ||
511 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
512 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
513 | { | |
514 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
515 | __put_user(kfl->l_type, &ufl->l_type) || | |
516 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
517 | __put_user(kfl->l_start, &ufl->l_start) || | |
518 | __put_user(kfl->l_len, &ufl->l_len) || | |
519 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
520 | return -EFAULT; | |
521 | return 0; | |
522 | } | |
523 | #endif | |
524 | ||
525 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
526 | unsigned long arg) | |
527 | { | |
528 | mm_segment_t old_fs; | |
529 | struct flock f; | |
530 | long ret; | |
531 | ||
532 | switch (cmd) { | |
533 | case F_GETLK: | |
534 | case F_SETLK: | |
535 | case F_SETLKW: | |
536 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
537 | if (ret != 0) | |
538 | break; | |
539 | old_fs = get_fs(); | |
540 | set_fs(KERNEL_DS); | |
541 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
542 | set_fs(old_fs); | |
543 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
544 | /* GETLK was successfule and we need to return the data... |
545 | * but it needs to fit in the compat structure. | |
546 | * l_start shouldn't be too big, unless the original | |
547 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
548 | * case the app was asking for trouble, so we return | |
549 | * -EOVERFLOW in that case. | |
550 | * l_len could be too big, in which case we just truncate it, | |
551 | * and only allow the app to see that part of the conflicting | |
552 | * lock that might make sense to it anyway | |
553 | */ | |
554 | ||
555 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 556 | ret = -EOVERFLOW; |
2520f14c N |
557 | if (f.l_len > COMPAT_OFF_T_MAX) |
558 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
559 | if (ret == 0) |
560 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
561 | } | |
562 | break; | |
563 | ||
564 | case F_GETLK64: | |
565 | case F_SETLK64: | |
566 | case F_SETLKW64: | |
567 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
568 | if (ret != 0) | |
569 | break; | |
570 | old_fs = get_fs(); | |
571 | set_fs(KERNEL_DS); | |
572 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
573 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
574 | (unsigned long)&f); | |
575 | set_fs(old_fs); | |
576 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
577 | /* need to return lock information - see above for commentary */ |
578 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 579 | ret = -EOVERFLOW; |
2520f14c N |
580 | if (f.l_len > COMPAT_LOFF_T_MAX) |
581 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
582 | if (ret == 0) |
583 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
584 | } | |
585 | break; | |
586 | ||
587 | default: | |
588 | ret = sys_fcntl(fd, cmd, arg); | |
589 | break; | |
590 | } | |
591 | return ret; | |
592 | } | |
593 | ||
594 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
595 | unsigned long arg) | |
596 | { | |
597 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
598 | return -EINVAL; | |
599 | return compat_sys_fcntl64(fd, cmd, arg); | |
600 | } | |
601 | ||
602 | asmlinkage long | |
603 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
604 | { | |
605 | long ret; | |
606 | aio_context_t ctx64; | |
607 | ||
608 | mm_segment_t oldfs = get_fs(); | |
609 | if (unlikely(get_user(ctx64, ctx32p))) | |
610 | return -EFAULT; | |
611 | ||
612 | set_fs(KERNEL_DS); | |
613 | /* The __user pointer cast is valid because of the set_fs() */ | |
614 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
615 | set_fs(oldfs); | |
616 | /* truncating is ok because it's a user address */ | |
617 | if (!ret) | |
618 | ret = put_user((u32) ctx64, ctx32p); | |
619 | return ret; | |
620 | } | |
621 | ||
622 | asmlinkage long | |
623 | compat_sys_io_getevents(aio_context_t ctx_id, | |
624 | unsigned long min_nr, | |
625 | unsigned long nr, | |
626 | struct io_event __user *events, | |
627 | struct compat_timespec __user *timeout) | |
628 | { | |
629 | long ret; | |
630 | struct timespec t; | |
631 | struct timespec __user *ut = NULL; | |
632 | ||
633 | ret = -EFAULT; | |
634 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
635 | nr * sizeof(struct io_event)))) | |
636 | goto out; | |
637 | if (timeout) { | |
638 | if (get_compat_timespec(&t, timeout)) | |
639 | goto out; | |
640 | ||
641 | ut = compat_alloc_user_space(sizeof(*ut)); | |
642 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
643 | goto out; | |
644 | } | |
645 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
646 | out: | |
647 | return ret; | |
648 | } | |
649 | ||
650 | static inline long | |
651 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
652 | { | |
653 | compat_uptr_t uptr; | |
654 | int i; | |
655 | ||
656 | for (i = 0; i < nr; ++i) { | |
657 | if (get_user(uptr, ptr32 + i)) | |
658 | return -EFAULT; | |
659 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
660 | return -EFAULT; | |
661 | } | |
662 | return 0; | |
663 | } | |
664 | ||
665 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
666 | ||
667 | asmlinkage long | |
668 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
669 | { | |
670 | struct iocb __user * __user *iocb64; | |
671 | long ret; | |
672 | ||
673 | if (unlikely(nr < 0)) | |
674 | return -EINVAL; | |
675 | ||
676 | if (nr > MAX_AIO_SUBMITS) | |
677 | nr = MAX_AIO_SUBMITS; | |
678 | ||
679 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
680 | ret = copy_iocb(nr, iocb, iocb64); | |
681 | if (!ret) | |
682 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
683 | return ret; | |
684 | } | |
685 | ||
686 | struct compat_ncp_mount_data { | |
687 | compat_int_t version; | |
688 | compat_uint_t ncp_fd; | |
202e5979 | 689 | __compat_uid_t mounted_uid; |
1da177e4 LT |
690 | compat_pid_t wdog_pid; |
691 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
692 | compat_uint_t time_out; | |
693 | compat_uint_t retry_count; | |
694 | compat_uint_t flags; | |
202e5979 SR |
695 | __compat_uid_t uid; |
696 | __compat_gid_t gid; | |
1da177e4 LT |
697 | compat_mode_t file_mode; |
698 | compat_mode_t dir_mode; | |
699 | }; | |
700 | ||
701 | struct compat_ncp_mount_data_v4 { | |
702 | compat_int_t version; | |
703 | compat_ulong_t flags; | |
704 | compat_ulong_t mounted_uid; | |
705 | compat_long_t wdog_pid; | |
706 | compat_uint_t ncp_fd; | |
707 | compat_uint_t time_out; | |
708 | compat_uint_t retry_count; | |
709 | compat_ulong_t uid; | |
710 | compat_ulong_t gid; | |
711 | compat_ulong_t file_mode; | |
712 | compat_ulong_t dir_mode; | |
713 | }; | |
714 | ||
715 | static void *do_ncp_super_data_conv(void *raw_data) | |
716 | { | |
717 | int version = *(unsigned int *)raw_data; | |
718 | ||
719 | if (version == 3) { | |
720 | struct compat_ncp_mount_data *c_n = raw_data; | |
721 | struct ncp_mount_data *n = raw_data; | |
722 | ||
723 | n->dir_mode = c_n->dir_mode; | |
724 | n->file_mode = c_n->file_mode; | |
725 | n->gid = c_n->gid; | |
726 | n->uid = c_n->uid; | |
727 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
728 | n->wdog_pid = c_n->wdog_pid; | |
729 | n->mounted_uid = c_n->mounted_uid; | |
730 | } else if (version == 4) { | |
731 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
732 | struct ncp_mount_data_v4 *n = raw_data; | |
733 | ||
734 | n->dir_mode = c_n->dir_mode; | |
735 | n->file_mode = c_n->file_mode; | |
736 | n->gid = c_n->gid; | |
737 | n->uid = c_n->uid; | |
738 | n->retry_count = c_n->retry_count; | |
739 | n->time_out = c_n->time_out; | |
740 | n->ncp_fd = c_n->ncp_fd; | |
741 | n->wdog_pid = c_n->wdog_pid; | |
742 | n->mounted_uid = c_n->mounted_uid; | |
743 | n->flags = c_n->flags; | |
744 | } else if (version != 5) { | |
745 | return NULL; | |
746 | } | |
747 | ||
748 | return raw_data; | |
749 | } | |
750 | ||
751 | struct compat_smb_mount_data { | |
752 | compat_int_t version; | |
202e5979 SR |
753 | __compat_uid_t mounted_uid; |
754 | __compat_uid_t uid; | |
755 | __compat_gid_t gid; | |
1da177e4 LT |
756 | compat_mode_t file_mode; |
757 | compat_mode_t dir_mode; | |
758 | }; | |
759 | ||
760 | static void *do_smb_super_data_conv(void *raw_data) | |
761 | { | |
762 | struct smb_mount_data *s = raw_data; | |
763 | struct compat_smb_mount_data *c_s = raw_data; | |
764 | ||
765 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
766 | goto out; | |
767 | s->dir_mode = c_s->dir_mode; | |
768 | s->file_mode = c_s->file_mode; | |
769 | s->gid = c_s->gid; | |
770 | s->uid = c_s->uid; | |
771 | s->mounted_uid = c_s->mounted_uid; | |
772 | out: | |
773 | return raw_data; | |
774 | } | |
775 | ||
9a9947bf DH |
776 | struct compat_nfs_string { |
777 | compat_uint_t len; | |
5fc3e624 | 778 | compat_uptr_t data; |
9a9947bf DH |
779 | }; |
780 | ||
781 | static inline void compat_nfs_string(struct nfs_string *dst, | |
782 | struct compat_nfs_string *src) | |
783 | { | |
784 | dst->data = compat_ptr(src->data); | |
785 | dst->len = src->len; | |
786 | } | |
787 | ||
788 | struct compat_nfs4_mount_data_v1 { | |
789 | compat_int_t version; | |
790 | compat_int_t flags; | |
791 | compat_int_t rsize; | |
792 | compat_int_t wsize; | |
793 | compat_int_t timeo; | |
794 | compat_int_t retrans; | |
795 | compat_int_t acregmin; | |
796 | compat_int_t acregmax; | |
797 | compat_int_t acdirmin; | |
798 | compat_int_t acdirmax; | |
799 | struct compat_nfs_string client_addr; | |
800 | struct compat_nfs_string mnt_path; | |
801 | struct compat_nfs_string hostname; | |
802 | compat_uint_t host_addrlen; | |
5fc3e624 | 803 | compat_uptr_t host_addr; |
9a9947bf DH |
804 | compat_int_t proto; |
805 | compat_int_t auth_flavourlen; | |
5fc3e624 | 806 | compat_uptr_t auth_flavours; |
9a9947bf DH |
807 | }; |
808 | ||
809 | static int do_nfs4_super_data_conv(void *raw_data) | |
810 | { | |
811 | int version = *(compat_uint_t *) raw_data; | |
812 | ||
813 | if (version == 1) { | |
814 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
815 | struct nfs4_mount_data *real = raw_data; | |
816 | ||
817 | /* copy the fields backwards */ | |
818 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
819 | real->auth_flavourlen = raw->auth_flavourlen; | |
820 | real->proto = raw->proto; | |
821 | real->host_addr = compat_ptr(raw->host_addr); | |
822 | real->host_addrlen = raw->host_addrlen; | |
823 | compat_nfs_string(&real->hostname, &raw->hostname); | |
824 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
825 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
826 | real->acdirmax = raw->acdirmax; | |
827 | real->acdirmin = raw->acdirmin; | |
828 | real->acregmax = raw->acregmax; | |
829 | real->acregmin = raw->acregmin; | |
830 | real->retrans = raw->retrans; | |
831 | real->timeo = raw->timeo; | |
832 | real->wsize = raw->wsize; | |
833 | real->rsize = raw->rsize; | |
834 | real->flags = raw->flags; | |
835 | real->version = raw->version; | |
836 | } | |
837 | else { | |
838 | return -EINVAL; | |
839 | } | |
840 | ||
841 | return 0; | |
842 | } | |
843 | ||
1da177e4 LT |
844 | #define SMBFS_NAME "smbfs" |
845 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 846 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
847 | |
848 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
849 | char __user * type, unsigned long flags, | |
850 | void __user * data) | |
851 | { | |
852 | unsigned long type_page; | |
853 | unsigned long data_page; | |
854 | unsigned long dev_page; | |
855 | char *dir_page; | |
856 | int retval; | |
857 | ||
858 | retval = copy_mount_options (type, &type_page); | |
859 | if (retval < 0) | |
860 | goto out; | |
861 | ||
862 | dir_page = getname(dir_name); | |
863 | retval = PTR_ERR(dir_page); | |
864 | if (IS_ERR(dir_page)) | |
865 | goto out1; | |
866 | ||
867 | retval = copy_mount_options (dev_name, &dev_page); | |
868 | if (retval < 0) | |
869 | goto out2; | |
870 | ||
871 | retval = copy_mount_options (data, &data_page); | |
872 | if (retval < 0) | |
873 | goto out3; | |
874 | ||
875 | retval = -EINVAL; | |
876 | ||
822191a2 | 877 | if (type_page && data_page) { |
1da177e4 LT |
878 | if (!strcmp((char *)type_page, SMBFS_NAME)) { |
879 | do_smb_super_data_conv((void *)data_page); | |
880 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
881 | do_ncp_super_data_conv((void *)data_page); | |
9a9947bf DH |
882 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
883 | if (do_nfs4_super_data_conv((void *) data_page)) | |
884 | goto out4; | |
1da177e4 LT |
885 | } |
886 | } | |
887 | ||
888 | lock_kernel(); | |
889 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
890 | flags, (void*)data_page); | |
891 | unlock_kernel(); | |
892 | ||
9a9947bf | 893 | out4: |
1da177e4 LT |
894 | free_page(data_page); |
895 | out3: | |
896 | free_page(dev_page); | |
897 | out2: | |
898 | putname(dir_page); | |
899 | out1: | |
900 | free_page(type_page); | |
901 | out: | |
902 | return retval; | |
903 | } | |
904 | ||
905 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
1da177e4 LT |
906 | |
907 | struct compat_old_linux_dirent { | |
908 | compat_ulong_t d_ino; | |
909 | compat_ulong_t d_offset; | |
910 | unsigned short d_namlen; | |
911 | char d_name[1]; | |
912 | }; | |
913 | ||
914 | struct compat_readdir_callback { | |
915 | struct compat_old_linux_dirent __user *dirent; | |
916 | int result; | |
917 | }; | |
918 | ||
919 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 920 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
921 | { |
922 | struct compat_readdir_callback *buf = __buf; | |
923 | struct compat_old_linux_dirent __user *dirent; | |
afefdbb2 | 924 | compat_ulong_t d_ino; |
1da177e4 LT |
925 | |
926 | if (buf->result) | |
927 | return -EINVAL; | |
afefdbb2 DH |
928 | d_ino = ino; |
929 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
930 | return -EOVERFLOW; | |
1da177e4 LT |
931 | buf->result++; |
932 | dirent = buf->dirent; | |
933 | if (!access_ok(VERIFY_WRITE, dirent, | |
934 | (unsigned long)(dirent->d_name + namlen + 1) - | |
935 | (unsigned long)dirent)) | |
936 | goto efault; | |
afefdbb2 | 937 | if ( __put_user(d_ino, &dirent->d_ino) || |
1da177e4 LT |
938 | __put_user(offset, &dirent->d_offset) || |
939 | __put_user(namlen, &dirent->d_namlen) || | |
940 | __copy_to_user(dirent->d_name, name, namlen) || | |
941 | __put_user(0, dirent->d_name + namlen)) | |
942 | goto efault; | |
943 | return 0; | |
944 | efault: | |
945 | buf->result = -EFAULT; | |
946 | return -EFAULT; | |
947 | } | |
948 | ||
949 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
950 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
951 | { | |
952 | int error; | |
953 | struct file *file; | |
954 | struct compat_readdir_callback buf; | |
955 | ||
956 | error = -EBADF; | |
957 | file = fget(fd); | |
958 | if (!file) | |
959 | goto out; | |
960 | ||
961 | buf.result = 0; | |
962 | buf.dirent = dirent; | |
963 | ||
964 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
965 | if (error >= 0) | |
966 | error = buf.result; | |
967 | ||
968 | fput(file); | |
969 | out: | |
970 | return error; | |
971 | } | |
972 | ||
973 | struct compat_linux_dirent { | |
974 | compat_ulong_t d_ino; | |
975 | compat_ulong_t d_off; | |
976 | unsigned short d_reclen; | |
977 | char d_name[1]; | |
978 | }; | |
979 | ||
980 | struct compat_getdents_callback { | |
981 | struct compat_linux_dirent __user *current_dir; | |
982 | struct compat_linux_dirent __user *previous; | |
983 | int count; | |
984 | int error; | |
985 | }; | |
986 | ||
987 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
afefdbb2 | 988 | loff_t offset, u64 ino, unsigned int d_type) |
1da177e4 LT |
989 | { |
990 | struct compat_linux_dirent __user * dirent; | |
991 | struct compat_getdents_callback *buf = __buf; | |
afefdbb2 | 992 | compat_ulong_t d_ino; |
022a1692 | 993 | int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t)); |
1da177e4 LT |
994 | |
995 | buf->error = -EINVAL; /* only used if we fail.. */ | |
996 | if (reclen > buf->count) | |
997 | return -EINVAL; | |
afefdbb2 DH |
998 | d_ino = ino; |
999 | if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) | |
1000 | return -EOVERFLOW; | |
1da177e4 LT |
1001 | dirent = buf->previous; |
1002 | if (dirent) { | |
1003 | if (__put_user(offset, &dirent->d_off)) | |
1004 | goto efault; | |
1005 | } | |
1006 | dirent = buf->current_dir; | |
afefdbb2 | 1007 | if (__put_user(d_ino, &dirent->d_ino)) |
1da177e4 LT |
1008 | goto efault; |
1009 | if (__put_user(reclen, &dirent->d_reclen)) | |
1010 | goto efault; | |
1011 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1012 | goto efault; | |
1013 | if (__put_user(0, dirent->d_name + namlen)) | |
1014 | goto efault; | |
1015 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
1016 | goto efault; | |
1017 | buf->previous = dirent; | |
1018 | dirent = (void __user *)dirent + reclen; | |
1019 | buf->current_dir = dirent; | |
1020 | buf->count -= reclen; | |
1021 | return 0; | |
1022 | efault: | |
1023 | buf->error = -EFAULT; | |
1024 | return -EFAULT; | |
1025 | } | |
1026 | ||
1027 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1028 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1029 | { | |
1030 | struct file * file; | |
1031 | struct compat_linux_dirent __user * lastdirent; | |
1032 | struct compat_getdents_callback buf; | |
1033 | int error; | |
1034 | ||
1035 | error = -EFAULT; | |
1036 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1037 | goto out; | |
1038 | ||
1039 | error = -EBADF; | |
1040 | file = fget(fd); | |
1041 | if (!file) | |
1042 | goto out; | |
1043 | ||
1044 | buf.current_dir = dirent; | |
1045 | buf.previous = NULL; | |
1046 | buf.count = count; | |
1047 | buf.error = 0; | |
1048 | ||
1049 | error = vfs_readdir(file, compat_filldir, &buf); | |
1050 | if (error < 0) | |
1051 | goto out_putf; | |
1052 | error = buf.error; | |
1053 | lastdirent = buf.previous; | |
1054 | if (lastdirent) { | |
1055 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1056 | error = -EFAULT; | |
1057 | else | |
1058 | error = count - buf.count; | |
1059 | } | |
1060 | ||
1061 | out_putf: | |
1062 | fput(file); | |
1063 | out: | |
1064 | return error; | |
1065 | } | |
1066 | ||
1067 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1da177e4 LT |
1068 | |
1069 | struct compat_getdents_callback64 { | |
1070 | struct linux_dirent64 __user *current_dir; | |
1071 | struct linux_dirent64 __user *previous; | |
1072 | int count; | |
1073 | int error; | |
1074 | }; | |
1075 | ||
1076 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
afefdbb2 | 1077 | u64 ino, unsigned int d_type) |
1da177e4 LT |
1078 | { |
1079 | struct linux_dirent64 __user *dirent; | |
1080 | struct compat_getdents_callback64 *buf = __buf; | |
1081 | int jj = NAME_OFFSET(dirent); | |
022a1692 | 1082 | int reclen = ALIGN(jj + namlen + 1, sizeof(u64)); |
1da177e4 LT |
1083 | u64 off; |
1084 | ||
1085 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1086 | if (reclen > buf->count) | |
1087 | return -EINVAL; | |
1088 | dirent = buf->previous; | |
1089 | ||
1090 | if (dirent) { | |
1091 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1092 | goto efault; | |
1093 | } | |
1094 | dirent = buf->current_dir; | |
1095 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1096 | goto efault; | |
1097 | off = 0; | |
1098 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1099 | goto efault; | |
1100 | if (__put_user(reclen, &dirent->d_reclen)) | |
1101 | goto efault; | |
1102 | if (__put_user(d_type, &dirent->d_type)) | |
1103 | goto efault; | |
1104 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1105 | goto efault; | |
1106 | if (__put_user(0, dirent->d_name + namlen)) | |
1107 | goto efault; | |
1108 | buf->previous = dirent; | |
1109 | dirent = (void __user *)dirent + reclen; | |
1110 | buf->current_dir = dirent; | |
1111 | buf->count -= reclen; | |
1112 | return 0; | |
1113 | efault: | |
1114 | buf->error = -EFAULT; | |
1115 | return -EFAULT; | |
1116 | } | |
1117 | ||
1118 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1119 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1120 | { | |
1121 | struct file * file; | |
1122 | struct linux_dirent64 __user * lastdirent; | |
1123 | struct compat_getdents_callback64 buf; | |
1124 | int error; | |
1125 | ||
1126 | error = -EFAULT; | |
1127 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1128 | goto out; | |
1129 | ||
1130 | error = -EBADF; | |
1131 | file = fget(fd); | |
1132 | if (!file) | |
1133 | goto out; | |
1134 | ||
1135 | buf.current_dir = dirent; | |
1136 | buf.previous = NULL; | |
1137 | buf.count = count; | |
1138 | buf.error = 0; | |
1139 | ||
1140 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1141 | if (error < 0) | |
1142 | goto out_putf; | |
1143 | error = buf.error; | |
1144 | lastdirent = buf.previous; | |
1145 | if (lastdirent) { | |
1146 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
7116e994 HC |
1147 | error = -EFAULT; |
1148 | if (__put_user_unaligned(d_off, &lastdirent->d_off)) | |
1149 | goto out_putf; | |
1da177e4 LT |
1150 | error = count - buf.count; |
1151 | } | |
1152 | ||
1153 | out_putf: | |
1154 | fput(file); | |
1155 | out: | |
1156 | return error; | |
1157 | } | |
1158 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1159 | ||
1160 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1161 | const struct compat_iovec __user *uvector, | |
1162 | unsigned long nr_segs, loff_t *pos) | |
1163 | { | |
1da177e4 LT |
1164 | compat_ssize_t tot_len; |
1165 | struct iovec iovstack[UIO_FASTIOV]; | |
1166 | struct iovec *iov=iovstack, *vector; | |
1167 | ssize_t ret; | |
1168 | int seg; | |
1169 | io_fn_t fn; | |
1170 | iov_fn_t fnv; | |
1171 | ||
1172 | /* | |
1173 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1174 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1175 | * traditionally returned zero for zero segments, so... | |
1176 | */ | |
1177 | ret = 0; | |
1178 | if (nr_segs == 0) | |
1179 | goto out; | |
1180 | ||
1181 | /* | |
1182 | * First get the "struct iovec" from user memory and | |
1183 | * verify all the pointers | |
1184 | */ | |
1185 | ret = -EINVAL; | |
1186 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1187 | goto out; | |
1188 | if (!file->f_op) | |
1189 | goto out; | |
1190 | if (nr_segs > UIO_FASTIOV) { | |
1191 | ret = -ENOMEM; | |
1192 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1193 | if (!iov) | |
1194 | goto out; | |
1195 | } | |
1196 | ret = -EFAULT; | |
1197 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1198 | goto out; | |
1199 | ||
1200 | /* | |
1201 | * Single unix specification: | |
1202 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1203 | * ssize_t. The total length is fitting an ssize_t | |
1204 | * | |
1205 | * Be careful here because iov_len is a size_t not an ssize_t | |
1206 | */ | |
1207 | tot_len = 0; | |
1208 | vector = iov; | |
1209 | ret = -EINVAL; | |
1210 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1211 | compat_ssize_t tmp = tot_len; | |
1212 | compat_ssize_t len; | |
1213 | compat_uptr_t buf; | |
1214 | ||
1215 | if (__get_user(len, &uvector->iov_len) || | |
1216 | __get_user(buf, &uvector->iov_base)) { | |
1217 | ret = -EFAULT; | |
1218 | goto out; | |
1219 | } | |
1220 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1221 | goto out; | |
1222 | tot_len += len; | |
1223 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1224 | goto out; | |
1225 | vector->iov_base = compat_ptr(buf); | |
1226 | vector->iov_len = (compat_size_t) len; | |
1227 | uvector++; | |
1228 | vector++; | |
1229 | } | |
1230 | if (tot_len == 0) { | |
1231 | ret = 0; | |
1232 | goto out; | |
1233 | } | |
1234 | ||
1235 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1236 | if (ret < 0) |
1da177e4 LT |
1237 | goto out; |
1238 | ||
e7edf9cd JM |
1239 | ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE); |
1240 | if (ret) | |
1241 | goto out; | |
1242 | ||
1da177e4 LT |
1243 | fnv = NULL; |
1244 | if (type == READ) { | |
1245 | fn = file->f_op->read; | |
ee0b3e67 | 1246 | fnv = file->f_op->aio_read; |
1da177e4 LT |
1247 | } else { |
1248 | fn = (io_fn_t)file->f_op->write; | |
ee0b3e67 | 1249 | fnv = file->f_op->aio_write; |
1da177e4 LT |
1250 | } |
1251 | ||
ee0b3e67 BP |
1252 | if (fnv) |
1253 | ret = do_sync_readv_writev(file, iov, nr_segs, tot_len, | |
1254 | pos, fnv); | |
1255 | else | |
1256 | ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn); | |
1da177e4 | 1257 | |
1da177e4 LT |
1258 | out: |
1259 | if (iov != iovstack) | |
1260 | kfree(iov); | |
0eeca283 | 1261 | if ((ret + (type == READ)) > 0) { |
0f7fc9e4 | 1262 | struct dentry *dentry = file->f_path.dentry; |
0eeca283 RL |
1263 | if (type == READ) |
1264 | fsnotify_access(dentry); | |
1265 | else | |
1266 | fsnotify_modify(dentry); | |
1267 | } | |
1da177e4 LT |
1268 | return ret; |
1269 | } | |
1270 | ||
1271 | asmlinkage ssize_t | |
1272 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1273 | { | |
1274 | struct file *file; | |
1275 | ssize_t ret = -EBADF; | |
1276 | ||
1277 | file = fget(fd); | |
1278 | if (!file) | |
1279 | return -EBADF; | |
1280 | ||
1281 | if (!(file->f_mode & FMODE_READ)) | |
1282 | goto out; | |
1283 | ||
1284 | ret = -EINVAL; | |
ee0b3e67 | 1285 | if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read)) |
1da177e4 LT |
1286 | goto out; |
1287 | ||
1288 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1289 | ||
1290 | out: | |
1291 | fput(file); | |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | asmlinkage ssize_t | |
1296 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1297 | { | |
1298 | struct file *file; | |
1299 | ssize_t ret = -EBADF; | |
1300 | ||
1301 | file = fget(fd); | |
1302 | if (!file) | |
1303 | return -EBADF; | |
1304 | if (!(file->f_mode & FMODE_WRITE)) | |
1305 | goto out; | |
1306 | ||
1307 | ret = -EINVAL; | |
ee0b3e67 | 1308 | if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write)) |
1da177e4 LT |
1309 | goto out; |
1310 | ||
1311 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1312 | ||
1313 | out: | |
1314 | fput(file); | |
1315 | return ret; | |
1316 | } | |
1317 | ||
d2610202 AK |
1318 | asmlinkage long |
1319 | compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, | |
1320 | unsigned int nr_segs, unsigned int flags) | |
1321 | { | |
1322 | unsigned i; | |
90cbad65 | 1323 | struct iovec __user *iov; |
98232d50 | 1324 | if (nr_segs > UIO_MAXIOV) |
d2610202 AK |
1325 | return -EINVAL; |
1326 | iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec)); | |
1327 | for (i = 0; i < nr_segs; i++) { | |
1328 | struct compat_iovec v; | |
1329 | if (get_user(v.iov_base, &iov32[i].iov_base) || | |
1330 | get_user(v.iov_len, &iov32[i].iov_len) || | |
1331 | put_user(compat_ptr(v.iov_base), &iov[i].iov_base) || | |
1332 | put_user(v.iov_len, &iov[i].iov_len)) | |
1333 | return -EFAULT; | |
1334 | } | |
1335 | return sys_vmsplice(fd, iov, nr_segs, flags); | |
1336 | } | |
1337 | ||
e922efc3 MS |
1338 | /* |
1339 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1340 | * O_LARGEFILE flag. | |
1341 | */ | |
1342 | asmlinkage long | |
1343 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1344 | { | |
5590ff0d UD |
1345 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1346 | } | |
1347 | ||
1348 | /* | |
1349 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1350 | * O_LARGEFILE flag. | |
1351 | */ | |
1352 | asmlinkage long | |
9ad11ab4 | 1353 | compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode) |
5590ff0d UD |
1354 | { |
1355 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1356 | } |
1357 | ||
1da177e4 LT |
1358 | /* |
1359 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1360 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1361 | * and envp pointers. | |
1362 | */ | |
1363 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1364 | { | |
1365 | int i = 0; | |
1366 | ||
1367 | if (argv != NULL) { | |
1368 | for (;;) { | |
1369 | compat_uptr_t p; | |
1370 | ||
1371 | if (get_user(p, argv)) | |
1372 | return -EFAULT; | |
1373 | if (!p) | |
1374 | break; | |
1375 | argv++; | |
1376 | if(++i > max) | |
1377 | return -E2BIG; | |
1378 | } | |
1379 | } | |
1380 | return i; | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1385 | * except that it works with 32 bit argv and envp pointers. | |
1386 | */ | |
1387 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1388 | struct linux_binprm *bprm) | |
1389 | { | |
1390 | struct page *kmapped_page = NULL; | |
1391 | char *kaddr = NULL; | |
1392 | int ret; | |
1393 | ||
1394 | while (argc-- > 0) { | |
1395 | compat_uptr_t str; | |
1396 | int len; | |
1397 | unsigned long pos; | |
1398 | ||
1399 | if (get_user(str, argv+argc) || | |
1400 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1401 | ret = -EFAULT; | |
1402 | goto out; | |
1403 | } | |
1404 | ||
1405 | if (bprm->p < len) { | |
1406 | ret = -E2BIG; | |
1407 | goto out; | |
1408 | } | |
1409 | ||
1410 | bprm->p -= len; | |
1411 | /* XXX: add architecture specific overflow check here. */ | |
1412 | pos = bprm->p; | |
1413 | ||
1414 | while (len > 0) { | |
1415 | int i, new, err; | |
1416 | int offset, bytes_to_copy; | |
1417 | struct page *page; | |
1418 | ||
1419 | offset = pos % PAGE_SIZE; | |
1420 | i = pos/PAGE_SIZE; | |
1421 | page = bprm->page[i]; | |
1422 | new = 0; | |
1423 | if (!page) { | |
1424 | page = alloc_page(GFP_HIGHUSER); | |
1425 | bprm->page[i] = page; | |
1426 | if (!page) { | |
1427 | ret = -ENOMEM; | |
1428 | goto out; | |
1429 | } | |
1430 | new = 1; | |
1431 | } | |
1432 | ||
1433 | if (page != kmapped_page) { | |
1434 | if (kmapped_page) | |
1435 | kunmap(kmapped_page); | |
1436 | kmapped_page = page; | |
1437 | kaddr = kmap(kmapped_page); | |
1438 | } | |
1439 | if (new && offset) | |
1440 | memset(kaddr, 0, offset); | |
1441 | bytes_to_copy = PAGE_SIZE - offset; | |
1442 | if (bytes_to_copy > len) { | |
1443 | bytes_to_copy = len; | |
1444 | if (new) | |
1445 | memset(kaddr+offset+len, 0, | |
1446 | PAGE_SIZE-offset-len); | |
1447 | } | |
1448 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1449 | bytes_to_copy); | |
1450 | if (err) { | |
1451 | ret = -EFAULT; | |
1452 | goto out; | |
1453 | } | |
1454 | ||
1455 | pos += bytes_to_copy; | |
1456 | str += bytes_to_copy; | |
1457 | len -= bytes_to_copy; | |
1458 | } | |
1459 | } | |
1460 | ret = 0; | |
1461 | out: | |
1462 | if (kmapped_page) | |
1463 | kunmap(kmapped_page); | |
1464 | return ret; | |
1465 | } | |
1466 | ||
1467 | #ifdef CONFIG_MMU | |
1468 | ||
1469 | #define free_arg_pages(bprm) do { } while (0) | |
1470 | ||
1471 | #else | |
1472 | ||
1473 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1474 | { | |
1475 | int i; | |
1476 | ||
1477 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1478 | if (bprm->page[i]) | |
1479 | __free_page(bprm->page[i]); | |
1480 | bprm->page[i] = NULL; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | #endif /* CONFIG_MMU */ | |
1485 | ||
1486 | /* | |
1487 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1488 | * that it processes 32 bit argv and envp pointers. | |
1489 | */ | |
1490 | int compat_do_execve(char * filename, | |
1491 | compat_uptr_t __user *argv, | |
1492 | compat_uptr_t __user *envp, | |
1493 | struct pt_regs * regs) | |
1494 | { | |
1495 | struct linux_binprm *bprm; | |
1496 | struct file *file; | |
1497 | int retval; | |
1498 | int i; | |
1499 | ||
1500 | retval = -ENOMEM; | |
11b0b5ab | 1501 | bprm = kzalloc(sizeof(*bprm), GFP_KERNEL); |
1da177e4 LT |
1502 | if (!bprm) |
1503 | goto out_ret; | |
1da177e4 LT |
1504 | |
1505 | file = open_exec(filename); | |
1506 | retval = PTR_ERR(file); | |
1507 | if (IS_ERR(file)) | |
1508 | goto out_kfree; | |
1509 | ||
1510 | sched_exec(); | |
1511 | ||
1512 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1513 | bprm->file = file; | |
1514 | bprm->filename = filename; | |
1515 | bprm->interp = filename; | |
1516 | bprm->mm = mm_alloc(); | |
1517 | retval = -ENOMEM; | |
1518 | if (!bprm->mm) | |
1519 | goto out_file; | |
1520 | ||
1521 | retval = init_new_context(current, bprm->mm); | |
1522 | if (retval < 0) | |
1523 | goto out_mm; | |
1524 | ||
1525 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1526 | if ((retval = bprm->argc) < 0) | |
1527 | goto out_mm; | |
1528 | ||
1529 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1530 | if ((retval = bprm->envc) < 0) | |
1531 | goto out_mm; | |
1532 | ||
1533 | retval = security_bprm_alloc(bprm); | |
1534 | if (retval) | |
1535 | goto out; | |
1536 | ||
1537 | retval = prepare_binprm(bprm); | |
1538 | if (retval < 0) | |
1539 | goto out; | |
1540 | ||
1541 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1542 | if (retval < 0) | |
1543 | goto out; | |
1544 | ||
1545 | bprm->exec = bprm->p; | |
1546 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1547 | if (retval < 0) | |
1548 | goto out; | |
1549 | ||
1550 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1551 | if (retval < 0) | |
1552 | goto out; | |
1553 | ||
1554 | retval = search_binary_handler(bprm, regs); | |
1555 | if (retval >= 0) { | |
1556 | free_arg_pages(bprm); | |
1557 | ||
1558 | /* execve success */ | |
1559 | security_bprm_free(bprm); | |
4a805e86 | 1560 | acct_update_integrals(current); |
1da177e4 LT |
1561 | kfree(bprm); |
1562 | return retval; | |
1563 | } | |
1564 | ||
1565 | out: | |
1566 | /* Something went wrong, return the inode and free the argument pages*/ | |
1567 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1568 | struct page * page = bprm->page[i]; | |
1569 | if (page) | |
1570 | __free_page(page); | |
1571 | } | |
1572 | ||
1573 | if (bprm->security) | |
1574 | security_bprm_free(bprm); | |
1575 | ||
1576 | out_mm: | |
1577 | if (bprm->mm) | |
1578 | mmdrop(bprm->mm); | |
1579 | ||
1580 | out_file: | |
1581 | if (bprm->file) { | |
1582 | allow_write_access(bprm->file); | |
1583 | fput(bprm->file); | |
1584 | } | |
1585 | ||
1586 | out_kfree: | |
1587 | kfree(bprm); | |
1588 | ||
1589 | out_ret: | |
1590 | return retval; | |
1591 | } | |
1592 | ||
1593 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1594 | ||
1da177e4 LT |
1595 | /* |
1596 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1597 | * 64-bit unsigned longs. | |
1598 | */ | |
858119e1 | 1599 | static |
1da177e4 LT |
1600 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1601 | unsigned long *fdset) | |
1602 | { | |
022a1692 | 1603 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1604 | if (ufdset) { |
1605 | unsigned long odd; | |
1606 | ||
1607 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1608 | return -EFAULT; | |
1609 | ||
1610 | odd = nr & 1UL; | |
1611 | nr &= ~1UL; | |
1612 | while (nr) { | |
1613 | unsigned long h, l; | |
7116e994 HC |
1614 | if (__get_user(l, ufdset) || __get_user(h, ufdset+1)) |
1615 | return -EFAULT; | |
1da177e4 LT |
1616 | ufdset += 2; |
1617 | *fdset++ = h << 32 | l; | |
1618 | nr -= 2; | |
1619 | } | |
7116e994 HC |
1620 | if (odd && __get_user(*fdset, ufdset)) |
1621 | return -EFAULT; | |
1da177e4 LT |
1622 | } else { |
1623 | /* Tricky, must clear full unsigned long in the | |
1624 | * kernel fdset at the end, this makes sure that | |
1625 | * actually happens. | |
1626 | */ | |
1627 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1628 | } | |
1629 | return 0; | |
1630 | } | |
1631 | ||
858119e1 | 1632 | static |
7116e994 HC |
1633 | int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1634 | unsigned long *fdset) | |
1da177e4 LT |
1635 | { |
1636 | unsigned long odd; | |
022a1692 | 1637 | nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS); |
1da177e4 LT |
1638 | |
1639 | if (!ufdset) | |
7116e994 | 1640 | return 0; |
1da177e4 LT |
1641 | |
1642 | odd = nr & 1UL; | |
1643 | nr &= ~1UL; | |
1644 | while (nr) { | |
1645 | unsigned long h, l; | |
1646 | l = *fdset++; | |
1647 | h = l >> 32; | |
7116e994 HC |
1648 | if (__put_user(l, ufdset) || __put_user(h, ufdset+1)) |
1649 | return -EFAULT; | |
1da177e4 LT |
1650 | ufdset += 2; |
1651 | nr -= 2; | |
1652 | } | |
7116e994 HC |
1653 | if (odd && __put_user(*fdset, ufdset)) |
1654 | return -EFAULT; | |
1655 | return 0; | |
1da177e4 LT |
1656 | } |
1657 | ||
1658 | ||
1659 | /* | |
1660 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1661 | * should be compared to it from time to time | |
1662 | */ | |
1da177e4 LT |
1663 | |
1664 | /* | |
1665 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1666 | * like to be certain this leads to no problems. So I return | |
1667 | * EINTR just for safety. | |
1668 | * | |
1669 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1670 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1671 | */ | |
1672 | #define MAX_SELECT_SECONDS \ | |
1673 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1674 | ||
9f72949f DW |
1675 | int compat_core_sys_select(int n, compat_ulong_t __user *inp, |
1676 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout) | |
1da177e4 LT |
1677 | { |
1678 | fd_set_bits fds; | |
1679 | char *bits; | |
bbea9f69 | 1680 | int size, max_fds, ret = -EINVAL; |
a4531edd | 1681 | struct fdtable *fdt; |
1da177e4 | 1682 | |
1da177e4 LT |
1683 | if (n < 0) |
1684 | goto out_nofds; | |
1685 | ||
bbea9f69 | 1686 | /* max_fds can increase, so grab it once to avoid race */ |
ac5b8b6f | 1687 | rcu_read_lock(); |
a4531edd | 1688 | fdt = files_fdtable(current->files); |
bbea9f69 | 1689 | max_fds = fdt->max_fds; |
ac5b8b6f | 1690 | rcu_read_unlock(); |
bbea9f69 VL |
1691 | if (n > max_fds) |
1692 | n = max_fds; | |
1da177e4 LT |
1693 | |
1694 | /* | |
1695 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1696 | * since we used fdset we need to allocate memory in units of | |
1697 | * long-words. | |
1698 | */ | |
1699 | ret = -ENOMEM; | |
1700 | size = FDS_BYTES(n); | |
68c3431a | 1701 | bits = kmalloc(6 * size, GFP_KERNEL); |
1da177e4 LT |
1702 | if (!bits) |
1703 | goto out_nofds; | |
1704 | fds.in = (unsigned long *) bits; | |
1705 | fds.out = (unsigned long *) (bits + size); | |
1706 | fds.ex = (unsigned long *) (bits + 2*size); | |
1707 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1708 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1709 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1710 | ||
1711 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1712 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1713 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1714 | goto out; | |
1715 | zero_fd_set(n, fds.res_in); | |
1716 | zero_fd_set(n, fds.res_out); | |
1717 | zero_fd_set(n, fds.res_ex); | |
1718 | ||
9f72949f | 1719 | ret = do_select(n, &fds, timeout); |
1da177e4 LT |
1720 | |
1721 | if (ret < 0) | |
1722 | goto out; | |
1723 | if (!ret) { | |
1724 | ret = -ERESTARTNOHAND; | |
1725 | if (signal_pending(current)) | |
1726 | goto out; | |
1727 | ret = 0; | |
1728 | } | |
1729 | ||
7116e994 HC |
1730 | if (compat_set_fd_set(n, inp, fds.res_in) || |
1731 | compat_set_fd_set(n, outp, fds.res_out) || | |
1732 | compat_set_fd_set(n, exp, fds.res_ex)) | |
1733 | ret = -EFAULT; | |
1da177e4 | 1734 | out: |
68c3431a | 1735 | kfree(bits); |
1da177e4 LT |
1736 | out_nofds: |
1737 | return ret; | |
1738 | } | |
1739 | ||
9f72949f DW |
1740 | asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp, |
1741 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1742 | struct compat_timeval __user *tvp) | |
1743 | { | |
1744 | s64 timeout = -1; | |
1745 | struct compat_timeval tv; | |
1746 | int ret; | |
1747 | ||
1748 | if (tvp) { | |
1749 | if (copy_from_user(&tv, tvp, sizeof(tv))) | |
1750 | return -EFAULT; | |
1751 | ||
1752 | if (tv.tv_sec < 0 || tv.tv_usec < 0) | |
1753 | return -EINVAL; | |
1754 | ||
1755 | /* Cast to u64 to make GCC stop complaining */ | |
1756 | if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS) | |
1757 | timeout = -1; /* infinite */ | |
1758 | else { | |
022a1692 | 1759 | timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ); |
9f72949f DW |
1760 | timeout += tv.tv_sec * HZ; |
1761 | } | |
1762 | } | |
1763 | ||
1764 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1765 | ||
1766 | if (tvp) { | |
643a6545 AM |
1767 | struct compat_timeval rtv; |
1768 | ||
9f72949f DW |
1769 | if (current->personality & STICKY_TIMEOUTS) |
1770 | goto sticky; | |
643a6545 AM |
1771 | rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)); |
1772 | rtv.tv_sec = timeout; | |
74910e6c | 1773 | if (compat_timeval_compare(&rtv, &tv) >= 0) |
643a6545 AM |
1774 | rtv = tv; |
1775 | if (copy_to_user(tvp, &rtv, sizeof(rtv))) { | |
9f72949f DW |
1776 | sticky: |
1777 | /* | |
1778 | * If an application puts its timeval in read-only | |
1779 | * memory, we don't want the Linux-specific update to | |
1780 | * the timeval to cause a fault after the select has | |
1781 | * completed successfully. However, because we're not | |
1782 | * updating the timeval, we can't restart the system | |
1783 | * call. | |
1784 | */ | |
1785 | if (ret == -ERESTARTNOHAND) | |
1786 | ret = -EINTR; | |
1787 | } | |
1788 | } | |
1789 | ||
1790 | return ret; | |
1791 | } | |
1792 | ||
1793 | #ifdef TIF_RESTORE_SIGMASK | |
1794 | asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp, | |
1795 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1796 | struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask, | |
1797 | compat_size_t sigsetsize) | |
1798 | { | |
1799 | compat_sigset_t ss32; | |
1800 | sigset_t ksigmask, sigsaved; | |
cb82a6cd | 1801 | s64 timeout = MAX_SCHEDULE_TIMEOUT; |
9f72949f DW |
1802 | struct compat_timespec ts; |
1803 | int ret; | |
1804 | ||
1805 | if (tsp) { | |
1806 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1807 | return -EFAULT; | |
1808 | ||
1809 | if (ts.tv_sec < 0 || ts.tv_nsec < 0) | |
1810 | return -EINVAL; | |
1811 | } | |
1812 | ||
1813 | if (sigmask) { | |
1814 | if (sigsetsize != sizeof(compat_sigset_t)) | |
1815 | return -EINVAL; | |
1816 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1817 | return -EFAULT; | |
1818 | sigset_from_compat(&ksigmask, &ss32); | |
1819 | ||
1820 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1821 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1822 | } | |
1823 | ||
1824 | do { | |
1825 | if (tsp) { | |
1826 | if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) { | |
022a1692 | 1827 | timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1828 | timeout += ts.tv_sec * (unsigned long)HZ; |
1829 | ts.tv_sec = 0; | |
1830 | ts.tv_nsec = 0; | |
1831 | } else { | |
1832 | ts.tv_sec -= MAX_SELECT_SECONDS; | |
1833 | timeout = MAX_SELECT_SECONDS * HZ; | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | ret = compat_core_sys_select(n, inp, outp, exp, &timeout); | |
1838 | ||
1839 | } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec)); | |
1840 | ||
87c2b7c0 | 1841 | if (tsp) { |
643a6545 AM |
1842 | struct compat_timespec rts; |
1843 | ||
87c2b7c0 HC |
1844 | if (current->personality & STICKY_TIMEOUTS) |
1845 | goto sticky; | |
1846 | ||
643a6545 AM |
1847 | rts.tv_sec = timeout / HZ; |
1848 | rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ); | |
1849 | if (rts.tv_nsec >= NSEC_PER_SEC) { | |
1850 | rts.tv_sec++; | |
1851 | rts.tv_nsec -= NSEC_PER_SEC; | |
9f72949f | 1852 | } |
74910e6c | 1853 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 | 1854 | rts = ts; |
87c2b7c0 HC |
1855 | if (copy_to_user(tsp, &rts, sizeof(rts))) { |
1856 | sticky: | |
1857 | /* | |
1858 | * If an application puts its timeval in read-only | |
1859 | * memory, we don't want the Linux-specific update to | |
1860 | * the timeval to cause a fault after the select has | |
1861 | * completed successfully. However, because we're not | |
1862 | * updating the timeval, we can't restart the system | |
1863 | * call. | |
1864 | */ | |
1865 | if (ret == -ERESTARTNOHAND) | |
1866 | ret = -EINTR; | |
1867 | } | |
9f72949f DW |
1868 | } |
1869 | ||
1870 | if (ret == -ERESTARTNOHAND) { | |
1871 | /* | |
1872 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1873 | * the signal on the way back to userspace, before the signal | |
1874 | * mask is restored. | |
1875 | */ | |
1876 | if (sigmask) { | |
1877 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1878 | sizeof(sigsaved)); | |
1879 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1880 | } | |
1881 | } else if (sigmask) | |
1882 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1883 | ||
1884 | return ret; | |
1885 | } | |
1886 | ||
1887 | asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp, | |
1888 | compat_ulong_t __user *outp, compat_ulong_t __user *exp, | |
1889 | struct compat_timespec __user *tsp, void __user *sig) | |
1890 | { | |
1891 | compat_size_t sigsetsize = 0; | |
1892 | compat_uptr_t up = 0; | |
1893 | ||
1894 | if (sig) { | |
1895 | if (!access_ok(VERIFY_READ, sig, | |
1896 | sizeof(compat_uptr_t)+sizeof(compat_size_t)) || | |
1897 | __get_user(up, (compat_uptr_t __user *)sig) || | |
1898 | __get_user(sigsetsize, | |
1899 | (compat_size_t __user *)(sig+sizeof(up)))) | |
1900 | return -EFAULT; | |
1901 | } | |
1902 | return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up), | |
1903 | sigsetsize); | |
1904 | } | |
1905 | ||
1906 | asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds, | |
1907 | unsigned int nfds, struct compat_timespec __user *tsp, | |
1908 | const compat_sigset_t __user *sigmask, compat_size_t sigsetsize) | |
1909 | { | |
1910 | compat_sigset_t ss32; | |
1911 | sigset_t ksigmask, sigsaved; | |
1912 | struct compat_timespec ts; | |
1913 | s64 timeout = -1; | |
1914 | int ret; | |
1915 | ||
1916 | if (tsp) { | |
1917 | if (copy_from_user(&ts, tsp, sizeof(ts))) | |
1918 | return -EFAULT; | |
1919 | ||
1920 | /* We assume that ts.tv_sec is always lower than | |
1921 | the number of seconds that can be expressed in | |
1922 | an s64. Otherwise the compiler bitches at us */ | |
022a1692 | 1923 | timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ); |
9f72949f DW |
1924 | timeout += ts.tv_sec * HZ; |
1925 | } | |
1926 | ||
1927 | if (sigmask) { | |
3835a9bd | 1928 | if (sigsetsize != sizeof(compat_sigset_t)) |
9f72949f DW |
1929 | return -EINVAL; |
1930 | if (copy_from_user(&ss32, sigmask, sizeof(ss32))) | |
1931 | return -EFAULT; | |
1932 | sigset_from_compat(&ksigmask, &ss32); | |
1933 | ||
1934 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
1935 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
1936 | } | |
1937 | ||
1938 | ret = do_sys_poll(ufds, nfds, &timeout); | |
1939 | ||
1940 | /* We can restart this syscall, usually */ | |
1941 | if (ret == -EINTR) { | |
1942 | /* | |
1943 | * Don't restore the signal mask yet. Let do_signal() deliver | |
1944 | * the signal on the way back to userspace, before the signal | |
1945 | * mask is restored. | |
1946 | */ | |
1947 | if (sigmask) { | |
1948 | memcpy(¤t->saved_sigmask, &sigsaved, | |
1949 | sizeof(sigsaved)); | |
1950 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
1951 | } | |
1952 | ret = -ERESTARTNOHAND; | |
1953 | } else if (sigmask) | |
1954 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1955 | ||
1956 | if (tsp && timeout >= 0) { | |
643a6545 AM |
1957 | struct compat_timespec rts; |
1958 | ||
9f72949f DW |
1959 | if (current->personality & STICKY_TIMEOUTS) |
1960 | goto sticky; | |
1961 | /* Yes, we know it's actually an s64, but it's also positive. */ | |
643a6545 AM |
1962 | rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) * |
1963 | 1000; | |
1964 | rts.tv_sec = timeout; | |
74910e6c | 1965 | if (compat_timespec_compare(&rts, &ts) >= 0) |
643a6545 AM |
1966 | rts = ts; |
1967 | if (copy_to_user(tsp, &rts, sizeof(rts))) { | |
9f72949f DW |
1968 | sticky: |
1969 | /* | |
1970 | * If an application puts its timeval in read-only | |
1971 | * memory, we don't want the Linux-specific update to | |
1972 | * the timeval to cause a fault after the select has | |
1973 | * completed successfully. However, because we're not | |
1974 | * updating the timeval, we can't restart the system | |
1975 | * call. | |
1976 | */ | |
1977 | if (ret == -ERESTARTNOHAND && timeout >= 0) | |
1978 | ret = -EINTR; | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | return ret; | |
1983 | } | |
1984 | #endif /* TIF_RESTORE_SIGMASK */ | |
1985 | ||
1da177e4 LT |
1986 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) |
1987 | /* Stuff for NFS server syscalls... */ | |
1988 | struct compat_nfsctl_svc { | |
1989 | u16 svc32_port; | |
1990 | s32 svc32_nthreads; | |
1991 | }; | |
1992 | ||
1993 | struct compat_nfsctl_client { | |
1994 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1995 | s32 cl32_naddr; | |
1996 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1997 | s32 cl32_fhkeytype; | |
1998 | s32 cl32_fhkeylen; | |
1999 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
2000 | }; | |
2001 | ||
2002 | struct compat_nfsctl_export { | |
2003 | char ex32_client[NFSCLNT_IDMAX+1]; | |
2004 | char ex32_path[NFS_MAXPATHLEN+1]; | |
2005 | compat_dev_t ex32_dev; | |
2006 | compat_ino_t ex32_ino; | |
2007 | compat_int_t ex32_flags; | |
202e5979 SR |
2008 | __compat_uid_t ex32_anon_uid; |
2009 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
2010 | }; |
2011 | ||
2012 | struct compat_nfsctl_fdparm { | |
2013 | struct sockaddr gd32_addr; | |
2014 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2015 | compat_int_t gd32_version; | |
2016 | }; | |
2017 | ||
2018 | struct compat_nfsctl_fsparm { | |
2019 | struct sockaddr gd32_addr; | |
2020 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
2021 | compat_int_t gd32_maxlen; | |
2022 | }; | |
2023 | ||
2024 | struct compat_nfsctl_arg { | |
2025 | compat_int_t ca32_version; /* safeguard */ | |
2026 | union { | |
2027 | struct compat_nfsctl_svc u32_svc; | |
2028 | struct compat_nfsctl_client u32_client; | |
2029 | struct compat_nfsctl_export u32_export; | |
2030 | struct compat_nfsctl_fdparm u32_getfd; | |
2031 | struct compat_nfsctl_fsparm u32_getfs; | |
2032 | } u; | |
2033 | #define ca32_svc u.u32_svc | |
2034 | #define ca32_client u.u32_client | |
2035 | #define ca32_export u.u32_export | |
2036 | #define ca32_getfd u.u32_getfd | |
2037 | #define ca32_getfs u.u32_getfs | |
2038 | }; | |
2039 | ||
2040 | union compat_nfsctl_res { | |
2041 | __u8 cr32_getfh[NFS_FHSIZE]; | |
2042 | struct knfsd_fh cr32_getfs; | |
2043 | }; | |
2044 | ||
d64b1c87 LFS |
2045 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, |
2046 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2047 | { |
d64b1c87 LFS |
2048 | if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) || |
2049 | get_user(karg->ca_version, &arg->ca32_version) || | |
2050 | __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) || | |
2051 | __get_user(karg->ca_svc.svc_nthreads, | |
2052 | &arg->ca32_svc.svc32_nthreads)) | |
2053 | return -EFAULT; | |
2054 | return 0; | |
1da177e4 LT |
2055 | } |
2056 | ||
d64b1c87 LFS |
2057 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, |
2058 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2059 | { |
d64b1c87 LFS |
2060 | if (!access_ok(VERIFY_READ, &arg->ca32_client, |
2061 | sizeof(arg->ca32_client)) || | |
2062 | get_user(karg->ca_version, &arg->ca32_version) || | |
2063 | __copy_from_user(&karg->ca_client.cl_ident[0], | |
2064 | &arg->ca32_client.cl32_ident[0], | |
2065 | NFSCLNT_IDMAX) || | |
2066 | __get_user(karg->ca_client.cl_naddr, | |
2067 | &arg->ca32_client.cl32_naddr) || | |
2068 | __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
2069 | &arg->ca32_client.cl32_addrlist[0], | |
2070 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) || | |
2071 | __get_user(karg->ca_client.cl_fhkeytype, | |
2072 | &arg->ca32_client.cl32_fhkeytype) || | |
2073 | __get_user(karg->ca_client.cl_fhkeylen, | |
2074 | &arg->ca32_client.cl32_fhkeylen) || | |
2075 | __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
2076 | &arg->ca32_client.cl32_fhkey[0], | |
2077 | NFSCLNT_KEYMAX)) | |
2078 | return -EFAULT; | |
1da177e4 | 2079 | |
d64b1c87 | 2080 | return 0; |
1da177e4 LT |
2081 | } |
2082 | ||
d64b1c87 LFS |
2083 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, |
2084 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2085 | { |
d64b1c87 LFS |
2086 | if (!access_ok(VERIFY_READ, &arg->ca32_export, |
2087 | sizeof(arg->ca32_export)) || | |
2088 | get_user(karg->ca_version, &arg->ca32_version) || | |
2089 | __copy_from_user(&karg->ca_export.ex_client[0], | |
2090 | &arg->ca32_export.ex32_client[0], | |
2091 | NFSCLNT_IDMAX) || | |
2092 | __copy_from_user(&karg->ca_export.ex_path[0], | |
2093 | &arg->ca32_export.ex32_path[0], | |
2094 | NFS_MAXPATHLEN) || | |
2095 | __get_user(karg->ca_export.ex_dev, | |
2096 | &arg->ca32_export.ex32_dev) || | |
2097 | __get_user(karg->ca_export.ex_ino, | |
2098 | &arg->ca32_export.ex32_ino) || | |
2099 | __get_user(karg->ca_export.ex_flags, | |
2100 | &arg->ca32_export.ex32_flags) || | |
2101 | __get_user(karg->ca_export.ex_anon_uid, | |
2102 | &arg->ca32_export.ex32_anon_uid) || | |
2103 | __get_user(karg->ca_export.ex_anon_gid, | |
2104 | &arg->ca32_export.ex32_anon_gid)) | |
2105 | return -EFAULT; | |
1da177e4 LT |
2106 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); |
2107 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
2108 | ||
d64b1c87 | 2109 | return 0; |
1da177e4 LT |
2110 | } |
2111 | ||
d64b1c87 LFS |
2112 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, |
2113 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2114 | { |
d64b1c87 LFS |
2115 | if (!access_ok(VERIFY_READ, &arg->ca32_getfd, |
2116 | sizeof(arg->ca32_getfd)) || | |
2117 | get_user(karg->ca_version, &arg->ca32_version) || | |
2118 | __copy_from_user(&karg->ca_getfd.gd_addr, | |
2119 | &arg->ca32_getfd.gd32_addr, | |
2120 | (sizeof(struct sockaddr))) || | |
2121 | __copy_from_user(&karg->ca_getfd.gd_path, | |
2122 | &arg->ca32_getfd.gd32_path, | |
2123 | (NFS_MAXPATHLEN+1)) || | |
2124 | __get_user(karg->ca_getfd.gd_version, | |
2125 | &arg->ca32_getfd.gd32_version)) | |
2126 | return -EFAULT; | |
1da177e4 | 2127 | |
d64b1c87 | 2128 | return 0; |
1da177e4 LT |
2129 | } |
2130 | ||
d64b1c87 LFS |
2131 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, |
2132 | struct compat_nfsctl_arg __user *arg) | |
1da177e4 | 2133 | { |
d64b1c87 LFS |
2134 | if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) || |
2135 | get_user(karg->ca_version, &arg->ca32_version) || | |
2136 | __copy_from_user(&karg->ca_getfs.gd_addr, | |
2137 | &arg->ca32_getfs.gd32_addr, | |
2138 | (sizeof(struct sockaddr))) || | |
2139 | __copy_from_user(&karg->ca_getfs.gd_path, | |
2140 | &arg->ca32_getfs.gd32_path, | |
2141 | (NFS_MAXPATHLEN+1)) || | |
2142 | __get_user(karg->ca_getfs.gd_maxlen, | |
2143 | &arg->ca32_getfs.gd32_maxlen)) | |
2144 | return -EFAULT; | |
1da177e4 | 2145 | |
d64b1c87 | 2146 | return 0; |
1da177e4 LT |
2147 | } |
2148 | ||
2149 | /* This really doesn't need translations, we are only passing | |
2150 | * back a union which contains opaque nfs file handle data. | |
2151 | */ | |
d64b1c87 LFS |
2152 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, |
2153 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2154 | { |
2155 | int err; | |
2156 | ||
2157 | err = copy_to_user(res, kres, sizeof(*res)); | |
2158 | ||
2159 | return (err) ? -EFAULT : 0; | |
2160 | } | |
2161 | ||
d64b1c87 LFS |
2162 | asmlinkage long compat_sys_nfsservctl(int cmd, |
2163 | struct compat_nfsctl_arg __user *arg, | |
2164 | union compat_nfsctl_res __user *res) | |
1da177e4 LT |
2165 | { |
2166 | struct nfsctl_arg *karg; | |
2167 | union nfsctl_res *kres; | |
2168 | mm_segment_t oldfs; | |
2169 | int err; | |
2170 | ||
2171 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
2172 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
2173 | if(!karg || !kres) { | |
2174 | err = -ENOMEM; | |
2175 | goto done; | |
2176 | } | |
2177 | ||
2178 | switch(cmd) { | |
2179 | case NFSCTL_SVC: | |
2180 | err = compat_nfs_svc_trans(karg, arg); | |
2181 | break; | |
2182 | ||
2183 | case NFSCTL_ADDCLIENT: | |
2184 | err = compat_nfs_clnt_trans(karg, arg); | |
2185 | break; | |
2186 | ||
2187 | case NFSCTL_DELCLIENT: | |
2188 | err = compat_nfs_clnt_trans(karg, arg); | |
2189 | break; | |
2190 | ||
2191 | case NFSCTL_EXPORT: | |
2192 | case NFSCTL_UNEXPORT: | |
2193 | err = compat_nfs_exp_trans(karg, arg); | |
2194 | break; | |
2195 | ||
2196 | case NFSCTL_GETFD: | |
2197 | err = compat_nfs_getfd_trans(karg, arg); | |
2198 | break; | |
2199 | ||
2200 | case NFSCTL_GETFS: | |
2201 | err = compat_nfs_getfs_trans(karg, arg); | |
2202 | break; | |
2203 | ||
2204 | default: | |
2205 | err = -EINVAL; | |
57070d01 | 2206 | break; |
1da177e4 LT |
2207 | } |
2208 | ||
57070d01 PS |
2209 | if (err) |
2210 | goto done; | |
2211 | ||
1da177e4 LT |
2212 | oldfs = get_fs(); |
2213 | set_fs(KERNEL_DS); | |
2214 | /* The __user pointer casts are valid because of the set_fs() */ | |
2215 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
2216 | set_fs(oldfs); | |
2217 | ||
2218 | if (err) | |
2219 | goto done; | |
2220 | ||
2221 | if((cmd == NFSCTL_GETFD) || | |
2222 | (cmd == NFSCTL_GETFS)) | |
2223 | err = compat_nfs_getfh_res_trans(kres, res); | |
2224 | ||
2225 | done: | |
2226 | kfree(karg); | |
2227 | kfree(kres); | |
2228 | return err; | |
2229 | } | |
2230 | #else /* !NFSD */ | |
2231 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
2232 | { | |
2233 | return sys_ni_syscall(); | |
2234 | } | |
2235 | #endif | |
f6dfb4fd DL |
2236 | |
2237 | #ifdef CONFIG_EPOLL | |
2238 | ||
2239 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2240 | asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd, | |
2241 | struct compat_epoll_event __user *event) | |
2242 | { | |
2243 | long err = 0; | |
2244 | struct compat_epoll_event user; | |
2245 | struct epoll_event __user *kernel = NULL; | |
2246 | ||
2247 | if (event) { | |
2248 | if (copy_from_user(&user, event, sizeof(user))) | |
2249 | return -EFAULT; | |
2250 | kernel = compat_alloc_user_space(sizeof(struct epoll_event)); | |
2251 | err |= __put_user(user.events, &kernel->events); | |
2252 | err |= __put_user(user.data, &kernel->data); | |
2253 | } | |
2254 | ||
2255 | return err ? err : sys_epoll_ctl(epfd, op, fd, kernel); | |
2256 | } | |
2257 | ||
2258 | ||
2259 | asmlinkage long compat_sys_epoll_wait(int epfd, | |
2260 | struct compat_epoll_event __user *events, | |
2261 | int maxevents, int timeout) | |
2262 | { | |
2263 | long i, ret, err = 0; | |
2264 | struct epoll_event __user *kbuf; | |
2265 | struct epoll_event ev; | |
2266 | ||
2267 | if ((maxevents <= 0) || | |
2268 | (maxevents > (INT_MAX / sizeof(struct epoll_event)))) | |
2269 | return -EINVAL; | |
2270 | kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents); | |
2271 | ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout); | |
2272 | for (i = 0; i < ret; i++) { | |
2273 | err |= __get_user(ev.events, &kbuf[i].events); | |
2274 | err |= __get_user(ev.data, &kbuf[i].data); | |
2275 | err |= __put_user(ev.events, &events->events); | |
2276 | err |= __put_user_unaligned(ev.data, &events->data); | |
2277 | events++; | |
2278 | } | |
2279 | ||
2280 | return err ? -EFAULT: ret; | |
2281 | } | |
2282 | #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */ | |
2283 | ||
2284 | #ifdef TIF_RESTORE_SIGMASK | |
2285 | asmlinkage long compat_sys_epoll_pwait(int epfd, | |
2286 | struct compat_epoll_event __user *events, | |
2287 | int maxevents, int timeout, | |
2288 | const compat_sigset_t __user *sigmask, | |
2289 | compat_size_t sigsetsize) | |
2290 | { | |
2291 | long err; | |
2292 | compat_sigset_t csigmask; | |
2293 | sigset_t ksigmask, sigsaved; | |
2294 | ||
2295 | /* | |
2296 | * If the caller wants a certain signal mask to be set during the wait, | |
2297 | * we apply it here. | |
2298 | */ | |
2299 | if (sigmask) { | |
2300 | if (sigsetsize != sizeof(compat_sigset_t)) | |
2301 | return -EINVAL; | |
2302 | if (copy_from_user(&csigmask, sigmask, sizeof(csigmask))) | |
2303 | return -EFAULT; | |
2304 | sigset_from_compat(&ksigmask, &csigmask); | |
2305 | sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP)); | |
2306 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); | |
2307 | } | |
2308 | ||
2309 | #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT | |
2310 | err = compat_sys_epoll_wait(epfd, events, maxevents, timeout); | |
2311 | #else | |
2312 | err = sys_epoll_wait(epfd, events, maxevents, timeout); | |
2313 | #endif | |
2314 | ||
2315 | /* | |
2316 | * If we changed the signal mask, we need to restore the original one. | |
2317 | * In case we've got a signal while waiting, we do not restore the | |
2318 | * signal mask yet, and we allow do_signal() to deliver the signal on | |
2319 | * the way back to userspace, before the signal mask is restored. | |
2320 | */ | |
2321 | if (sigmask) { | |
2322 | if (err == -EINTR) { | |
2323 | memcpy(¤t->saved_sigmask, &sigsaved, | |
2324 | sizeof(sigsaved)); | |
2325 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
2326 | } else | |
2327 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2328 | } | |
2329 | ||
2330 | return err; | |
2331 | } | |
2332 | #endif /* TIF_RESTORE_SIGMASK */ | |
2333 | ||
2334 | #endif /* CONFIG_EPOLL */ |