Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/compat.c | |
3 | * | |
4 | * Kernel compatibililty routines for e.g. 32 bit syscall support | |
5 | * on 64 bit kernels. | |
6 | * | |
7 | * Copyright (C) 2002 Stephen Rothwell, IBM Corporation | |
8 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
9 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
10 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
11 | * Copyright (C) 2003 Pavel Machek (pavel@suse.cz) | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
18 | #include <linux/linkage.h> | |
19 | #include <linux/compat.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/time.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/fcntl.h> | |
24 | #include <linux/namei.h> | |
25 | #include <linux/file.h> | |
26 | #include <linux/vfs.h> | |
27 | #include <linux/ioctl32.h> | |
28 | #include <linux/ioctl.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/sockios.h> /* for SIOCDEVPRIVATE */ | |
31 | #include <linux/smb.h> | |
32 | #include <linux/smb_mount.h> | |
33 | #include <linux/ncp_mount.h> | |
9a9947bf | 34 | #include <linux/nfs4_mount.h> |
1da177e4 LT |
35 | #include <linux/smp_lock.h> |
36 | #include <linux/syscalls.h> | |
37 | #include <linux/ctype.h> | |
38 | #include <linux/module.h> | |
39 | #include <linux/dirent.h> | |
0eeca283 | 40 | #include <linux/fsnotify.h> |
1da177e4 LT |
41 | #include <linux/highuid.h> |
42 | #include <linux/sunrpc/svc.h> | |
43 | #include <linux/nfsd/nfsd.h> | |
44 | #include <linux/nfsd/syscall.h> | |
45 | #include <linux/personality.h> | |
46 | #include <linux/rwsem.h> | |
4a805e86 DM |
47 | #include <linux/acct.h> |
48 | #include <linux/mm.h> | |
1da177e4 LT |
49 | |
50 | #include <net/sock.h> /* siocdevprivate_ioctl */ | |
51 | ||
52 | #include <asm/uaccess.h> | |
53 | #include <asm/mmu_context.h> | |
54 | #include <asm/ioctls.h> | |
55 | ||
56 | /* | |
57 | * Not all architectures have sys_utime, so implement this in terms | |
58 | * of sys_utimes. | |
59 | */ | |
60 | asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t) | |
61 | { | |
62 | struct timeval tv[2]; | |
63 | ||
64 | if (t) { | |
65 | if (get_user(tv[0].tv_sec, &t->actime) || | |
66 | get_user(tv[1].tv_sec, &t->modtime)) | |
67 | return -EFAULT; | |
68 | tv[0].tv_usec = 0; | |
69 | tv[1].tv_usec = 0; | |
70 | } | |
5590ff0d | 71 | return do_utimes(AT_FDCWD, filename, t ? tv : NULL); |
1da177e4 LT |
72 | } |
73 | ||
5590ff0d | 74 | asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, struct compat_timeval __user *t) |
1da177e4 LT |
75 | { |
76 | struct timeval tv[2]; | |
77 | ||
78 | if (t) { | |
79 | if (get_user(tv[0].tv_sec, &t[0].tv_sec) || | |
80 | get_user(tv[0].tv_usec, &t[0].tv_usec) || | |
81 | get_user(tv[1].tv_sec, &t[1].tv_sec) || | |
82 | get_user(tv[1].tv_usec, &t[1].tv_usec)) | |
83 | return -EFAULT; | |
84 | } | |
5590ff0d UD |
85 | return do_utimes(dfd, filename, t ? tv : NULL); |
86 | } | |
87 | ||
88 | asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t) | |
89 | { | |
90 | return compat_sys_futimesat(AT_FDCWD, filename, t); | |
1da177e4 LT |
91 | } |
92 | ||
93 | asmlinkage long compat_sys_newstat(char __user * filename, | |
94 | struct compat_stat __user *statbuf) | |
95 | { | |
96 | struct kstat stat; | |
5590ff0d | 97 | int error = vfs_stat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
98 | |
99 | if (!error) | |
100 | error = cp_compat_stat(&stat, statbuf); | |
101 | return error; | |
102 | } | |
103 | ||
104 | asmlinkage long compat_sys_newlstat(char __user * filename, | |
105 | struct compat_stat __user *statbuf) | |
106 | { | |
107 | struct kstat stat; | |
5590ff0d | 108 | int error = vfs_lstat_fd(AT_FDCWD, filename, &stat); |
1da177e4 LT |
109 | |
110 | if (!error) | |
111 | error = cp_compat_stat(&stat, statbuf); | |
112 | return error; | |
113 | } | |
114 | ||
5590ff0d UD |
115 | asmlinkage long compat_sys_newfstatat(int dfd, char __user *filename, |
116 | struct compat_stat __user *statbuf, int flag) | |
117 | { | |
118 | struct kstat stat; | |
119 | int error = -EINVAL; | |
120 | ||
121 | if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0) | |
122 | goto out; | |
123 | ||
124 | if (flag & AT_SYMLINK_NOFOLLOW) | |
125 | error = vfs_lstat_fd(dfd, filename, &stat); | |
126 | else | |
127 | error = vfs_stat_fd(dfd, filename, &stat); | |
128 | ||
129 | if (!error) | |
130 | error = cp_compat_stat(&stat, statbuf); | |
131 | ||
132 | out: | |
133 | return error; | |
134 | } | |
135 | ||
1da177e4 LT |
136 | asmlinkage long compat_sys_newfstat(unsigned int fd, |
137 | struct compat_stat __user * statbuf) | |
138 | { | |
139 | struct kstat stat; | |
140 | int error = vfs_fstat(fd, &stat); | |
141 | ||
142 | if (!error) | |
143 | error = cp_compat_stat(&stat, statbuf); | |
144 | return error; | |
145 | } | |
146 | ||
147 | static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf) | |
148 | { | |
149 | ||
150 | if (sizeof ubuf->f_blocks == 4) { | |
151 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
152 | 0xffffffff00000000ULL) | |
153 | return -EOVERFLOW; | |
154 | /* f_files and f_ffree may be -1; it's okay | |
155 | * to stuff that into 32 bits */ | |
156 | if (kbuf->f_files != 0xffffffffffffffffULL | |
157 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
158 | return -EOVERFLOW; | |
159 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
160 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
161 | return -EOVERFLOW; | |
162 | } | |
163 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
164 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
165 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
166 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
167 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
168 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
169 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
170 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
171 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
172 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
173 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
174 | __put_user(kbuf->f_frsize, &ubuf->f_frsize) || | |
175 | __put_user(0, &ubuf->f_spare[0]) || | |
176 | __put_user(0, &ubuf->f_spare[1]) || | |
177 | __put_user(0, &ubuf->f_spare[2]) || | |
178 | __put_user(0, &ubuf->f_spare[3]) || | |
179 | __put_user(0, &ubuf->f_spare[4])) | |
180 | return -EFAULT; | |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* | |
185 | * The following statfs calls are copies of code from fs/open.c and | |
186 | * should be checked against those from time to time | |
187 | */ | |
188 | asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf) | |
189 | { | |
190 | struct nameidata nd; | |
191 | int error; | |
192 | ||
193 | error = user_path_walk(path, &nd); | |
194 | if (!error) { | |
195 | struct kstatfs tmp; | |
196 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); | |
86e07ce7 DG |
197 | if (!error) |
198 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
199 | path_release(&nd); |
200 | } | |
201 | return error; | |
202 | } | |
203 | ||
204 | asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf) | |
205 | { | |
206 | struct file * file; | |
207 | struct kstatfs tmp; | |
208 | int error; | |
209 | ||
210 | error = -EBADF; | |
211 | file = fget(fd); | |
212 | if (!file) | |
213 | goto out; | |
214 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); | |
86e07ce7 DG |
215 | if (!error) |
216 | error = put_compat_statfs(buf, &tmp); | |
1da177e4 LT |
217 | fput(file); |
218 | out: | |
219 | return error; | |
220 | } | |
221 | ||
222 | static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf) | |
223 | { | |
224 | if (sizeof ubuf->f_blocks == 4) { | |
225 | if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) & | |
226 | 0xffffffff00000000ULL) | |
227 | return -EOVERFLOW; | |
228 | /* f_files and f_ffree may be -1; it's okay | |
229 | * to stuff that into 32 bits */ | |
230 | if (kbuf->f_files != 0xffffffffffffffffULL | |
231 | && (kbuf->f_files & 0xffffffff00000000ULL)) | |
232 | return -EOVERFLOW; | |
233 | if (kbuf->f_ffree != 0xffffffffffffffffULL | |
234 | && (kbuf->f_ffree & 0xffffffff00000000ULL)) | |
235 | return -EOVERFLOW; | |
236 | } | |
237 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) || | |
238 | __put_user(kbuf->f_type, &ubuf->f_type) || | |
239 | __put_user(kbuf->f_bsize, &ubuf->f_bsize) || | |
240 | __put_user(kbuf->f_blocks, &ubuf->f_blocks) || | |
241 | __put_user(kbuf->f_bfree, &ubuf->f_bfree) || | |
242 | __put_user(kbuf->f_bavail, &ubuf->f_bavail) || | |
243 | __put_user(kbuf->f_files, &ubuf->f_files) || | |
244 | __put_user(kbuf->f_ffree, &ubuf->f_ffree) || | |
245 | __put_user(kbuf->f_namelen, &ubuf->f_namelen) || | |
246 | __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) || | |
247 | __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) || | |
248 | __put_user(kbuf->f_frsize, &ubuf->f_frsize)) | |
249 | return -EFAULT; | |
250 | return 0; | |
251 | } | |
252 | ||
253 | asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf) | |
254 | { | |
255 | struct nameidata nd; | |
256 | int error; | |
257 | ||
258 | if (sz != sizeof(*buf)) | |
259 | return -EINVAL; | |
260 | ||
261 | error = user_path_walk(path, &nd); | |
262 | if (!error) { | |
263 | struct kstatfs tmp; | |
264 | error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); | |
86e07ce7 DG |
265 | if (!error) |
266 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
267 | path_release(&nd); |
268 | } | |
269 | return error; | |
270 | } | |
271 | ||
272 | asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf) | |
273 | { | |
274 | struct file * file; | |
275 | struct kstatfs tmp; | |
276 | int error; | |
277 | ||
278 | if (sz != sizeof(*buf)) | |
279 | return -EINVAL; | |
280 | ||
281 | error = -EBADF; | |
282 | file = fget(fd); | |
283 | if (!file) | |
284 | goto out; | |
285 | error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); | |
86e07ce7 DG |
286 | if (!error) |
287 | error = put_compat_statfs64(buf, &tmp); | |
1da177e4 LT |
288 | fput(file); |
289 | out: | |
290 | return error; | |
291 | } | |
292 | ||
293 | /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */ | |
294 | ||
295 | #define IOCTL_HASHSIZE 256 | |
296 | static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE]; | |
1da177e4 LT |
297 | |
298 | extern struct ioctl_trans ioctl_start[]; | |
299 | extern int ioctl_table_size; | |
300 | ||
301 | static inline unsigned long ioctl32_hash(unsigned long cmd) | |
302 | { | |
303 | return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE; | |
304 | } | |
305 | ||
306 | static void ioctl32_insert_translation(struct ioctl_trans *trans) | |
307 | { | |
308 | unsigned long hash; | |
309 | struct ioctl_trans *t; | |
310 | ||
311 | hash = ioctl32_hash (trans->cmd); | |
312 | if (!ioctl32_hash_table[hash]) | |
313 | ioctl32_hash_table[hash] = trans; | |
314 | else { | |
315 | t = ioctl32_hash_table[hash]; | |
316 | while (t->next) | |
317 | t = t->next; | |
318 | trans->next = NULL; | |
319 | t->next = trans; | |
320 | } | |
321 | } | |
322 | ||
323 | static int __init init_sys32_ioctl(void) | |
324 | { | |
325 | int i; | |
326 | ||
327 | for (i = 0; i < ioctl_table_size; i++) { | |
328 | if (ioctl_start[i].next != 0) { | |
329 | printk("ioctl translation %d bad\n",i); | |
330 | return -1; | |
331 | } | |
332 | ||
333 | ioctl32_insert_translation(&ioctl_start[i]); | |
334 | } | |
335 | return 0; | |
336 | } | |
337 | ||
338 | __initcall(init_sys32_ioctl); | |
339 | ||
1da177e4 LT |
340 | static void compat_ioctl_error(struct file *filp, unsigned int fd, |
341 | unsigned int cmd, unsigned long arg) | |
342 | { | |
343 | char buf[10]; | |
344 | char *fn = "?"; | |
345 | char *path; | |
346 | ||
347 | /* find the name of the device. */ | |
348 | path = (char *)__get_free_page(GFP_KERNEL); | |
349 | if (path) { | |
350 | fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE); | |
351 | if (IS_ERR(fn)) | |
352 | fn = "?"; | |
353 | } | |
354 | ||
355 | sprintf(buf,"'%c'", (cmd>>24) & 0x3f); | |
356 | if (!isprint(buf[1])) | |
357 | sprintf(buf, "%02x", buf[1]); | |
358 | printk("ioctl32(%s:%d): Unknown cmd fd(%d) " | |
359 | "cmd(%08x){%s} arg(%08x) on %s\n", | |
360 | current->comm, current->pid, | |
361 | (int)fd, (unsigned int)cmd, buf, | |
362 | (unsigned int)arg, fn); | |
363 | ||
364 | if (path) | |
365 | free_page((unsigned long)path); | |
366 | } | |
367 | ||
368 | asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, | |
369 | unsigned long arg) | |
370 | { | |
371 | struct file *filp; | |
372 | int error = -EBADF; | |
373 | struct ioctl_trans *t; | |
374 | int fput_needed; | |
375 | ||
376 | filp = fget_light(fd, &fput_needed); | |
377 | if (!filp) | |
378 | goto out; | |
379 | ||
380 | /* RED-PEN how should LSM module know it's handling 32bit? */ | |
381 | error = security_file_ioctl(filp, cmd, arg); | |
382 | if (error) | |
383 | goto out_fput; | |
384 | ||
385 | /* | |
386 | * To allow the compat_ioctl handlers to be self contained | |
387 | * we need to check the common ioctls here first. | |
388 | * Just handle them with the standard handlers below. | |
389 | */ | |
390 | switch (cmd) { | |
391 | case FIOCLEX: | |
392 | case FIONCLEX: | |
393 | case FIONBIO: | |
394 | case FIOASYNC: | |
395 | case FIOQSIZE: | |
396 | break; | |
397 | ||
398 | case FIBMAP: | |
399 | case FIGETBSZ: | |
400 | case FIONREAD: | |
401 | if (S_ISREG(filp->f_dentry->d_inode->i_mode)) | |
402 | break; | |
403 | /*FALL THROUGH*/ | |
404 | ||
405 | default: | |
406 | if (filp->f_op && filp->f_op->compat_ioctl) { | |
407 | error = filp->f_op->compat_ioctl(filp, cmd, arg); | |
408 | if (error != -ENOIOCTLCMD) | |
409 | goto out_fput; | |
410 | } | |
411 | ||
412 | if (!filp->f_op || | |
413 | (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl)) | |
414 | goto do_ioctl; | |
415 | break; | |
416 | } | |
417 | ||
1da177e4 LT |
418 | for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) { |
419 | if (t->cmd == cmd) | |
420 | goto found_handler; | |
421 | } | |
1da177e4 LT |
422 | |
423 | if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) && | |
424 | cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
425 | error = siocdevprivate_ioctl(fd, cmd, arg); | |
426 | } else { | |
427 | static int count; | |
428 | ||
429 | if (++count <= 50) | |
430 | compat_ioctl_error(filp, fd, cmd, arg); | |
431 | error = -EINVAL; | |
432 | } | |
433 | ||
434 | goto out_fput; | |
435 | ||
436 | found_handler: | |
437 | if (t->handler) { | |
438 | lock_kernel(); | |
439 | error = t->handler(fd, cmd, arg, filp); | |
440 | unlock_kernel(); | |
1da177e4 LT |
441 | goto out_fput; |
442 | } | |
443 | ||
1da177e4 LT |
444 | do_ioctl: |
445 | error = vfs_ioctl(filp, fd, cmd, arg); | |
446 | out_fput: | |
447 | fput_light(filp, fput_needed); | |
448 | out: | |
449 | return error; | |
450 | } | |
451 | ||
452 | static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
453 | { | |
454 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
455 | __get_user(kfl->l_type, &ufl->l_type) || | |
456 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
457 | __get_user(kfl->l_start, &ufl->l_start) || | |
458 | __get_user(kfl->l_len, &ufl->l_len) || | |
459 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
460 | return -EFAULT; | |
461 | return 0; | |
462 | } | |
463 | ||
464 | static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl) | |
465 | { | |
466 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
467 | __put_user(kfl->l_type, &ufl->l_type) || | |
468 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
469 | __put_user(kfl->l_start, &ufl->l_start) || | |
470 | __put_user(kfl->l_len, &ufl->l_len) || | |
471 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
472 | return -EFAULT; | |
473 | return 0; | |
474 | } | |
475 | ||
476 | #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64 | |
477 | static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
478 | { | |
479 | if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) || | |
480 | __get_user(kfl->l_type, &ufl->l_type) || | |
481 | __get_user(kfl->l_whence, &ufl->l_whence) || | |
482 | __get_user(kfl->l_start, &ufl->l_start) || | |
483 | __get_user(kfl->l_len, &ufl->l_len) || | |
484 | __get_user(kfl->l_pid, &ufl->l_pid)) | |
485 | return -EFAULT; | |
486 | return 0; | |
487 | } | |
488 | #endif | |
489 | ||
490 | #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64 | |
491 | static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl) | |
492 | { | |
493 | if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) || | |
494 | __put_user(kfl->l_type, &ufl->l_type) || | |
495 | __put_user(kfl->l_whence, &ufl->l_whence) || | |
496 | __put_user(kfl->l_start, &ufl->l_start) || | |
497 | __put_user(kfl->l_len, &ufl->l_len) || | |
498 | __put_user(kfl->l_pid, &ufl->l_pid)) | |
499 | return -EFAULT; | |
500 | return 0; | |
501 | } | |
502 | #endif | |
503 | ||
504 | asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd, | |
505 | unsigned long arg) | |
506 | { | |
507 | mm_segment_t old_fs; | |
508 | struct flock f; | |
509 | long ret; | |
510 | ||
511 | switch (cmd) { | |
512 | case F_GETLK: | |
513 | case F_SETLK: | |
514 | case F_SETLKW: | |
515 | ret = get_compat_flock(&f, compat_ptr(arg)); | |
516 | if (ret != 0) | |
517 | break; | |
518 | old_fs = get_fs(); | |
519 | set_fs(KERNEL_DS); | |
520 | ret = sys_fcntl(fd, cmd, (unsigned long)&f); | |
521 | set_fs(old_fs); | |
522 | if (cmd == F_GETLK && ret == 0) { | |
2520f14c N |
523 | /* GETLK was successfule and we need to return the data... |
524 | * but it needs to fit in the compat structure. | |
525 | * l_start shouldn't be too big, unless the original | |
526 | * start + end is greater than COMPAT_OFF_T_MAX, in which | |
527 | * case the app was asking for trouble, so we return | |
528 | * -EOVERFLOW in that case. | |
529 | * l_len could be too big, in which case we just truncate it, | |
530 | * and only allow the app to see that part of the conflicting | |
531 | * lock that might make sense to it anyway | |
532 | */ | |
533 | ||
534 | if (f.l_start > COMPAT_OFF_T_MAX) | |
1da177e4 | 535 | ret = -EOVERFLOW; |
2520f14c N |
536 | if (f.l_len > COMPAT_OFF_T_MAX) |
537 | f.l_len = COMPAT_OFF_T_MAX; | |
1da177e4 LT |
538 | if (ret == 0) |
539 | ret = put_compat_flock(&f, compat_ptr(arg)); | |
540 | } | |
541 | break; | |
542 | ||
543 | case F_GETLK64: | |
544 | case F_SETLK64: | |
545 | case F_SETLKW64: | |
546 | ret = get_compat_flock64(&f, compat_ptr(arg)); | |
547 | if (ret != 0) | |
548 | break; | |
549 | old_fs = get_fs(); | |
550 | set_fs(KERNEL_DS); | |
551 | ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK : | |
552 | ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW), | |
553 | (unsigned long)&f); | |
554 | set_fs(old_fs); | |
555 | if (cmd == F_GETLK64 && ret == 0) { | |
2520f14c N |
556 | /* need to return lock information - see above for commentary */ |
557 | if (f.l_start > COMPAT_LOFF_T_MAX) | |
1da177e4 | 558 | ret = -EOVERFLOW; |
2520f14c N |
559 | if (f.l_len > COMPAT_LOFF_T_MAX) |
560 | f.l_len = COMPAT_LOFF_T_MAX; | |
1da177e4 LT |
561 | if (ret == 0) |
562 | ret = put_compat_flock64(&f, compat_ptr(arg)); | |
563 | } | |
564 | break; | |
565 | ||
566 | default: | |
567 | ret = sys_fcntl(fd, cmd, arg); | |
568 | break; | |
569 | } | |
570 | return ret; | |
571 | } | |
572 | ||
573 | asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd, | |
574 | unsigned long arg) | |
575 | { | |
576 | if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64)) | |
577 | return -EINVAL; | |
578 | return compat_sys_fcntl64(fd, cmd, arg); | |
579 | } | |
580 | ||
581 | asmlinkage long | |
582 | compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p) | |
583 | { | |
584 | long ret; | |
585 | aio_context_t ctx64; | |
586 | ||
587 | mm_segment_t oldfs = get_fs(); | |
588 | if (unlikely(get_user(ctx64, ctx32p))) | |
589 | return -EFAULT; | |
590 | ||
591 | set_fs(KERNEL_DS); | |
592 | /* The __user pointer cast is valid because of the set_fs() */ | |
593 | ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64); | |
594 | set_fs(oldfs); | |
595 | /* truncating is ok because it's a user address */ | |
596 | if (!ret) | |
597 | ret = put_user((u32) ctx64, ctx32p); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | asmlinkage long | |
602 | compat_sys_io_getevents(aio_context_t ctx_id, | |
603 | unsigned long min_nr, | |
604 | unsigned long nr, | |
605 | struct io_event __user *events, | |
606 | struct compat_timespec __user *timeout) | |
607 | { | |
608 | long ret; | |
609 | struct timespec t; | |
610 | struct timespec __user *ut = NULL; | |
611 | ||
612 | ret = -EFAULT; | |
613 | if (unlikely(!access_ok(VERIFY_WRITE, events, | |
614 | nr * sizeof(struct io_event)))) | |
615 | goto out; | |
616 | if (timeout) { | |
617 | if (get_compat_timespec(&t, timeout)) | |
618 | goto out; | |
619 | ||
620 | ut = compat_alloc_user_space(sizeof(*ut)); | |
621 | if (copy_to_user(ut, &t, sizeof(t)) ) | |
622 | goto out; | |
623 | } | |
624 | ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut); | |
625 | out: | |
626 | return ret; | |
627 | } | |
628 | ||
629 | static inline long | |
630 | copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64) | |
631 | { | |
632 | compat_uptr_t uptr; | |
633 | int i; | |
634 | ||
635 | for (i = 0; i < nr; ++i) { | |
636 | if (get_user(uptr, ptr32 + i)) | |
637 | return -EFAULT; | |
638 | if (put_user(compat_ptr(uptr), ptr64 + i)) | |
639 | return -EFAULT; | |
640 | } | |
641 | return 0; | |
642 | } | |
643 | ||
644 | #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *)) | |
645 | ||
646 | asmlinkage long | |
647 | compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb) | |
648 | { | |
649 | struct iocb __user * __user *iocb64; | |
650 | long ret; | |
651 | ||
652 | if (unlikely(nr < 0)) | |
653 | return -EINVAL; | |
654 | ||
655 | if (nr > MAX_AIO_SUBMITS) | |
656 | nr = MAX_AIO_SUBMITS; | |
657 | ||
658 | iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64)); | |
659 | ret = copy_iocb(nr, iocb, iocb64); | |
660 | if (!ret) | |
661 | ret = sys_io_submit(ctx_id, nr, iocb64); | |
662 | return ret; | |
663 | } | |
664 | ||
665 | struct compat_ncp_mount_data { | |
666 | compat_int_t version; | |
667 | compat_uint_t ncp_fd; | |
202e5979 | 668 | __compat_uid_t mounted_uid; |
1da177e4 LT |
669 | compat_pid_t wdog_pid; |
670 | unsigned char mounted_vol[NCP_VOLNAME_LEN + 1]; | |
671 | compat_uint_t time_out; | |
672 | compat_uint_t retry_count; | |
673 | compat_uint_t flags; | |
202e5979 SR |
674 | __compat_uid_t uid; |
675 | __compat_gid_t gid; | |
1da177e4 LT |
676 | compat_mode_t file_mode; |
677 | compat_mode_t dir_mode; | |
678 | }; | |
679 | ||
680 | struct compat_ncp_mount_data_v4 { | |
681 | compat_int_t version; | |
682 | compat_ulong_t flags; | |
683 | compat_ulong_t mounted_uid; | |
684 | compat_long_t wdog_pid; | |
685 | compat_uint_t ncp_fd; | |
686 | compat_uint_t time_out; | |
687 | compat_uint_t retry_count; | |
688 | compat_ulong_t uid; | |
689 | compat_ulong_t gid; | |
690 | compat_ulong_t file_mode; | |
691 | compat_ulong_t dir_mode; | |
692 | }; | |
693 | ||
694 | static void *do_ncp_super_data_conv(void *raw_data) | |
695 | { | |
696 | int version = *(unsigned int *)raw_data; | |
697 | ||
698 | if (version == 3) { | |
699 | struct compat_ncp_mount_data *c_n = raw_data; | |
700 | struct ncp_mount_data *n = raw_data; | |
701 | ||
702 | n->dir_mode = c_n->dir_mode; | |
703 | n->file_mode = c_n->file_mode; | |
704 | n->gid = c_n->gid; | |
705 | n->uid = c_n->uid; | |
706 | memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int))); | |
707 | n->wdog_pid = c_n->wdog_pid; | |
708 | n->mounted_uid = c_n->mounted_uid; | |
709 | } else if (version == 4) { | |
710 | struct compat_ncp_mount_data_v4 *c_n = raw_data; | |
711 | struct ncp_mount_data_v4 *n = raw_data; | |
712 | ||
713 | n->dir_mode = c_n->dir_mode; | |
714 | n->file_mode = c_n->file_mode; | |
715 | n->gid = c_n->gid; | |
716 | n->uid = c_n->uid; | |
717 | n->retry_count = c_n->retry_count; | |
718 | n->time_out = c_n->time_out; | |
719 | n->ncp_fd = c_n->ncp_fd; | |
720 | n->wdog_pid = c_n->wdog_pid; | |
721 | n->mounted_uid = c_n->mounted_uid; | |
722 | n->flags = c_n->flags; | |
723 | } else if (version != 5) { | |
724 | return NULL; | |
725 | } | |
726 | ||
727 | return raw_data; | |
728 | } | |
729 | ||
730 | struct compat_smb_mount_data { | |
731 | compat_int_t version; | |
202e5979 SR |
732 | __compat_uid_t mounted_uid; |
733 | __compat_uid_t uid; | |
734 | __compat_gid_t gid; | |
1da177e4 LT |
735 | compat_mode_t file_mode; |
736 | compat_mode_t dir_mode; | |
737 | }; | |
738 | ||
739 | static void *do_smb_super_data_conv(void *raw_data) | |
740 | { | |
741 | struct smb_mount_data *s = raw_data; | |
742 | struct compat_smb_mount_data *c_s = raw_data; | |
743 | ||
744 | if (c_s->version != SMB_MOUNT_OLDVERSION) | |
745 | goto out; | |
746 | s->dir_mode = c_s->dir_mode; | |
747 | s->file_mode = c_s->file_mode; | |
748 | s->gid = c_s->gid; | |
749 | s->uid = c_s->uid; | |
750 | s->mounted_uid = c_s->mounted_uid; | |
751 | out: | |
752 | return raw_data; | |
753 | } | |
754 | ||
9a9947bf DH |
755 | struct compat_nfs_string { |
756 | compat_uint_t len; | |
5fc3e624 | 757 | compat_uptr_t data; |
9a9947bf DH |
758 | }; |
759 | ||
760 | static inline void compat_nfs_string(struct nfs_string *dst, | |
761 | struct compat_nfs_string *src) | |
762 | { | |
763 | dst->data = compat_ptr(src->data); | |
764 | dst->len = src->len; | |
765 | } | |
766 | ||
767 | struct compat_nfs4_mount_data_v1 { | |
768 | compat_int_t version; | |
769 | compat_int_t flags; | |
770 | compat_int_t rsize; | |
771 | compat_int_t wsize; | |
772 | compat_int_t timeo; | |
773 | compat_int_t retrans; | |
774 | compat_int_t acregmin; | |
775 | compat_int_t acregmax; | |
776 | compat_int_t acdirmin; | |
777 | compat_int_t acdirmax; | |
778 | struct compat_nfs_string client_addr; | |
779 | struct compat_nfs_string mnt_path; | |
780 | struct compat_nfs_string hostname; | |
781 | compat_uint_t host_addrlen; | |
5fc3e624 | 782 | compat_uptr_t host_addr; |
9a9947bf DH |
783 | compat_int_t proto; |
784 | compat_int_t auth_flavourlen; | |
5fc3e624 | 785 | compat_uptr_t auth_flavours; |
9a9947bf DH |
786 | }; |
787 | ||
788 | static int do_nfs4_super_data_conv(void *raw_data) | |
789 | { | |
790 | int version = *(compat_uint_t *) raw_data; | |
791 | ||
792 | if (version == 1) { | |
793 | struct compat_nfs4_mount_data_v1 *raw = raw_data; | |
794 | struct nfs4_mount_data *real = raw_data; | |
795 | ||
796 | /* copy the fields backwards */ | |
797 | real->auth_flavours = compat_ptr(raw->auth_flavours); | |
798 | real->auth_flavourlen = raw->auth_flavourlen; | |
799 | real->proto = raw->proto; | |
800 | real->host_addr = compat_ptr(raw->host_addr); | |
801 | real->host_addrlen = raw->host_addrlen; | |
802 | compat_nfs_string(&real->hostname, &raw->hostname); | |
803 | compat_nfs_string(&real->mnt_path, &raw->mnt_path); | |
804 | compat_nfs_string(&real->client_addr, &raw->client_addr); | |
805 | real->acdirmax = raw->acdirmax; | |
806 | real->acdirmin = raw->acdirmin; | |
807 | real->acregmax = raw->acregmax; | |
808 | real->acregmin = raw->acregmin; | |
809 | real->retrans = raw->retrans; | |
810 | real->timeo = raw->timeo; | |
811 | real->wsize = raw->wsize; | |
812 | real->rsize = raw->rsize; | |
813 | real->flags = raw->flags; | |
814 | real->version = raw->version; | |
815 | } | |
816 | else { | |
817 | return -EINVAL; | |
818 | } | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
1da177e4 LT |
823 | extern int copy_mount_options (const void __user *, unsigned long *); |
824 | ||
825 | #define SMBFS_NAME "smbfs" | |
826 | #define NCPFS_NAME "ncpfs" | |
9a9947bf | 827 | #define NFS4_NAME "nfs4" |
1da177e4 LT |
828 | |
829 | asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name, | |
830 | char __user * type, unsigned long flags, | |
831 | void __user * data) | |
832 | { | |
833 | unsigned long type_page; | |
834 | unsigned long data_page; | |
835 | unsigned long dev_page; | |
836 | char *dir_page; | |
837 | int retval; | |
838 | ||
839 | retval = copy_mount_options (type, &type_page); | |
840 | if (retval < 0) | |
841 | goto out; | |
842 | ||
843 | dir_page = getname(dir_name); | |
844 | retval = PTR_ERR(dir_page); | |
845 | if (IS_ERR(dir_page)) | |
846 | goto out1; | |
847 | ||
848 | retval = copy_mount_options (dev_name, &dev_page); | |
849 | if (retval < 0) | |
850 | goto out2; | |
851 | ||
852 | retval = copy_mount_options (data, &data_page); | |
853 | if (retval < 0) | |
854 | goto out3; | |
855 | ||
856 | retval = -EINVAL; | |
857 | ||
858 | if (type_page) { | |
859 | if (!strcmp((char *)type_page, SMBFS_NAME)) { | |
860 | do_smb_super_data_conv((void *)data_page); | |
861 | } else if (!strcmp((char *)type_page, NCPFS_NAME)) { | |
862 | do_ncp_super_data_conv((void *)data_page); | |
9a9947bf DH |
863 | } else if (!strcmp((char *)type_page, NFS4_NAME)) { |
864 | if (do_nfs4_super_data_conv((void *) data_page)) | |
865 | goto out4; | |
1da177e4 LT |
866 | } |
867 | } | |
868 | ||
869 | lock_kernel(); | |
870 | retval = do_mount((char*)dev_page, dir_page, (char*)type_page, | |
871 | flags, (void*)data_page); | |
872 | unlock_kernel(); | |
873 | ||
9a9947bf | 874 | out4: |
1da177e4 LT |
875 | free_page(data_page); |
876 | out3: | |
877 | free_page(dev_page); | |
878 | out2: | |
879 | putname(dir_page); | |
880 | out1: | |
881 | free_page(type_page); | |
882 | out: | |
883 | return retval; | |
884 | } | |
885 | ||
886 | #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de))) | |
887 | #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \ | |
888 | ~(sizeof(compat_long_t)-1)) | |
889 | ||
890 | struct compat_old_linux_dirent { | |
891 | compat_ulong_t d_ino; | |
892 | compat_ulong_t d_offset; | |
893 | unsigned short d_namlen; | |
894 | char d_name[1]; | |
895 | }; | |
896 | ||
897 | struct compat_readdir_callback { | |
898 | struct compat_old_linux_dirent __user *dirent; | |
899 | int result; | |
900 | }; | |
901 | ||
902 | static int compat_fillonedir(void *__buf, const char *name, int namlen, | |
903 | loff_t offset, ino_t ino, unsigned int d_type) | |
904 | { | |
905 | struct compat_readdir_callback *buf = __buf; | |
906 | struct compat_old_linux_dirent __user *dirent; | |
907 | ||
908 | if (buf->result) | |
909 | return -EINVAL; | |
910 | buf->result++; | |
911 | dirent = buf->dirent; | |
912 | if (!access_ok(VERIFY_WRITE, dirent, | |
913 | (unsigned long)(dirent->d_name + namlen + 1) - | |
914 | (unsigned long)dirent)) | |
915 | goto efault; | |
916 | if ( __put_user(ino, &dirent->d_ino) || | |
917 | __put_user(offset, &dirent->d_offset) || | |
918 | __put_user(namlen, &dirent->d_namlen) || | |
919 | __copy_to_user(dirent->d_name, name, namlen) || | |
920 | __put_user(0, dirent->d_name + namlen)) | |
921 | goto efault; | |
922 | return 0; | |
923 | efault: | |
924 | buf->result = -EFAULT; | |
925 | return -EFAULT; | |
926 | } | |
927 | ||
928 | asmlinkage long compat_sys_old_readdir(unsigned int fd, | |
929 | struct compat_old_linux_dirent __user *dirent, unsigned int count) | |
930 | { | |
931 | int error; | |
932 | struct file *file; | |
933 | struct compat_readdir_callback buf; | |
934 | ||
935 | error = -EBADF; | |
936 | file = fget(fd); | |
937 | if (!file) | |
938 | goto out; | |
939 | ||
940 | buf.result = 0; | |
941 | buf.dirent = dirent; | |
942 | ||
943 | error = vfs_readdir(file, compat_fillonedir, &buf); | |
944 | if (error >= 0) | |
945 | error = buf.result; | |
946 | ||
947 | fput(file); | |
948 | out: | |
949 | return error; | |
950 | } | |
951 | ||
952 | struct compat_linux_dirent { | |
953 | compat_ulong_t d_ino; | |
954 | compat_ulong_t d_off; | |
955 | unsigned short d_reclen; | |
956 | char d_name[1]; | |
957 | }; | |
958 | ||
959 | struct compat_getdents_callback { | |
960 | struct compat_linux_dirent __user *current_dir; | |
961 | struct compat_linux_dirent __user *previous; | |
962 | int count; | |
963 | int error; | |
964 | }; | |
965 | ||
966 | static int compat_filldir(void *__buf, const char *name, int namlen, | |
967 | loff_t offset, ino_t ino, unsigned int d_type) | |
968 | { | |
969 | struct compat_linux_dirent __user * dirent; | |
970 | struct compat_getdents_callback *buf = __buf; | |
971 | int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2); | |
972 | ||
973 | buf->error = -EINVAL; /* only used if we fail.. */ | |
974 | if (reclen > buf->count) | |
975 | return -EINVAL; | |
976 | dirent = buf->previous; | |
977 | if (dirent) { | |
978 | if (__put_user(offset, &dirent->d_off)) | |
979 | goto efault; | |
980 | } | |
981 | dirent = buf->current_dir; | |
982 | if (__put_user(ino, &dirent->d_ino)) | |
983 | goto efault; | |
984 | if (__put_user(reclen, &dirent->d_reclen)) | |
985 | goto efault; | |
986 | if (copy_to_user(dirent->d_name, name, namlen)) | |
987 | goto efault; | |
988 | if (__put_user(0, dirent->d_name + namlen)) | |
989 | goto efault; | |
990 | if (__put_user(d_type, (char __user *) dirent + reclen - 1)) | |
991 | goto efault; | |
992 | buf->previous = dirent; | |
993 | dirent = (void __user *)dirent + reclen; | |
994 | buf->current_dir = dirent; | |
995 | buf->count -= reclen; | |
996 | return 0; | |
997 | efault: | |
998 | buf->error = -EFAULT; | |
999 | return -EFAULT; | |
1000 | } | |
1001 | ||
1002 | asmlinkage long compat_sys_getdents(unsigned int fd, | |
1003 | struct compat_linux_dirent __user *dirent, unsigned int count) | |
1004 | { | |
1005 | struct file * file; | |
1006 | struct compat_linux_dirent __user * lastdirent; | |
1007 | struct compat_getdents_callback buf; | |
1008 | int error; | |
1009 | ||
1010 | error = -EFAULT; | |
1011 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1012 | goto out; | |
1013 | ||
1014 | error = -EBADF; | |
1015 | file = fget(fd); | |
1016 | if (!file) | |
1017 | goto out; | |
1018 | ||
1019 | buf.current_dir = dirent; | |
1020 | buf.previous = NULL; | |
1021 | buf.count = count; | |
1022 | buf.error = 0; | |
1023 | ||
1024 | error = vfs_readdir(file, compat_filldir, &buf); | |
1025 | if (error < 0) | |
1026 | goto out_putf; | |
1027 | error = buf.error; | |
1028 | lastdirent = buf.previous; | |
1029 | if (lastdirent) { | |
1030 | if (put_user(file->f_pos, &lastdirent->d_off)) | |
1031 | error = -EFAULT; | |
1032 | else | |
1033 | error = count - buf.count; | |
1034 | } | |
1035 | ||
1036 | out_putf: | |
1037 | fput(file); | |
1038 | out: | |
1039 | return error; | |
1040 | } | |
1041 | ||
1042 | #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64 | |
1043 | #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1)) | |
1044 | ||
1045 | struct compat_getdents_callback64 { | |
1046 | struct linux_dirent64 __user *current_dir; | |
1047 | struct linux_dirent64 __user *previous; | |
1048 | int count; | |
1049 | int error; | |
1050 | }; | |
1051 | ||
1052 | static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset, | |
1053 | ino_t ino, unsigned int d_type) | |
1054 | { | |
1055 | struct linux_dirent64 __user *dirent; | |
1056 | struct compat_getdents_callback64 *buf = __buf; | |
1057 | int jj = NAME_OFFSET(dirent); | |
1058 | int reclen = COMPAT_ROUND_UP64(jj + namlen + 1); | |
1059 | u64 off; | |
1060 | ||
1061 | buf->error = -EINVAL; /* only used if we fail.. */ | |
1062 | if (reclen > buf->count) | |
1063 | return -EINVAL; | |
1064 | dirent = buf->previous; | |
1065 | ||
1066 | if (dirent) { | |
1067 | if (__put_user_unaligned(offset, &dirent->d_off)) | |
1068 | goto efault; | |
1069 | } | |
1070 | dirent = buf->current_dir; | |
1071 | if (__put_user_unaligned(ino, &dirent->d_ino)) | |
1072 | goto efault; | |
1073 | off = 0; | |
1074 | if (__put_user_unaligned(off, &dirent->d_off)) | |
1075 | goto efault; | |
1076 | if (__put_user(reclen, &dirent->d_reclen)) | |
1077 | goto efault; | |
1078 | if (__put_user(d_type, &dirent->d_type)) | |
1079 | goto efault; | |
1080 | if (copy_to_user(dirent->d_name, name, namlen)) | |
1081 | goto efault; | |
1082 | if (__put_user(0, dirent->d_name + namlen)) | |
1083 | goto efault; | |
1084 | buf->previous = dirent; | |
1085 | dirent = (void __user *)dirent + reclen; | |
1086 | buf->current_dir = dirent; | |
1087 | buf->count -= reclen; | |
1088 | return 0; | |
1089 | efault: | |
1090 | buf->error = -EFAULT; | |
1091 | return -EFAULT; | |
1092 | } | |
1093 | ||
1094 | asmlinkage long compat_sys_getdents64(unsigned int fd, | |
1095 | struct linux_dirent64 __user * dirent, unsigned int count) | |
1096 | { | |
1097 | struct file * file; | |
1098 | struct linux_dirent64 __user * lastdirent; | |
1099 | struct compat_getdents_callback64 buf; | |
1100 | int error; | |
1101 | ||
1102 | error = -EFAULT; | |
1103 | if (!access_ok(VERIFY_WRITE, dirent, count)) | |
1104 | goto out; | |
1105 | ||
1106 | error = -EBADF; | |
1107 | file = fget(fd); | |
1108 | if (!file) | |
1109 | goto out; | |
1110 | ||
1111 | buf.current_dir = dirent; | |
1112 | buf.previous = NULL; | |
1113 | buf.count = count; | |
1114 | buf.error = 0; | |
1115 | ||
1116 | error = vfs_readdir(file, compat_filldir64, &buf); | |
1117 | if (error < 0) | |
1118 | goto out_putf; | |
1119 | error = buf.error; | |
1120 | lastdirent = buf.previous; | |
1121 | if (lastdirent) { | |
1122 | typeof(lastdirent->d_off) d_off = file->f_pos; | |
1123 | __put_user_unaligned(d_off, &lastdirent->d_off); | |
1124 | error = count - buf.count; | |
1125 | } | |
1126 | ||
1127 | out_putf: | |
1128 | fput(file); | |
1129 | out: | |
1130 | return error; | |
1131 | } | |
1132 | #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */ | |
1133 | ||
1134 | static ssize_t compat_do_readv_writev(int type, struct file *file, | |
1135 | const struct compat_iovec __user *uvector, | |
1136 | unsigned long nr_segs, loff_t *pos) | |
1137 | { | |
1138 | typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *); | |
1139 | typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *); | |
1140 | ||
1141 | compat_ssize_t tot_len; | |
1142 | struct iovec iovstack[UIO_FASTIOV]; | |
1143 | struct iovec *iov=iovstack, *vector; | |
1144 | ssize_t ret; | |
1145 | int seg; | |
1146 | io_fn_t fn; | |
1147 | iov_fn_t fnv; | |
1148 | ||
1149 | /* | |
1150 | * SuS says "The readv() function *may* fail if the iovcnt argument | |
1151 | * was less than or equal to 0, or greater than {IOV_MAX}. Linux has | |
1152 | * traditionally returned zero for zero segments, so... | |
1153 | */ | |
1154 | ret = 0; | |
1155 | if (nr_segs == 0) | |
1156 | goto out; | |
1157 | ||
1158 | /* | |
1159 | * First get the "struct iovec" from user memory and | |
1160 | * verify all the pointers | |
1161 | */ | |
1162 | ret = -EINVAL; | |
1163 | if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0)) | |
1164 | goto out; | |
1165 | if (!file->f_op) | |
1166 | goto out; | |
1167 | if (nr_segs > UIO_FASTIOV) { | |
1168 | ret = -ENOMEM; | |
1169 | iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL); | |
1170 | if (!iov) | |
1171 | goto out; | |
1172 | } | |
1173 | ret = -EFAULT; | |
1174 | if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector))) | |
1175 | goto out; | |
1176 | ||
1177 | /* | |
1178 | * Single unix specification: | |
1179 | * We should -EINVAL if an element length is not >= 0 and fitting an | |
1180 | * ssize_t. The total length is fitting an ssize_t | |
1181 | * | |
1182 | * Be careful here because iov_len is a size_t not an ssize_t | |
1183 | */ | |
1184 | tot_len = 0; | |
1185 | vector = iov; | |
1186 | ret = -EINVAL; | |
1187 | for (seg = 0 ; seg < nr_segs; seg++) { | |
1188 | compat_ssize_t tmp = tot_len; | |
1189 | compat_ssize_t len; | |
1190 | compat_uptr_t buf; | |
1191 | ||
1192 | if (__get_user(len, &uvector->iov_len) || | |
1193 | __get_user(buf, &uvector->iov_base)) { | |
1194 | ret = -EFAULT; | |
1195 | goto out; | |
1196 | } | |
1197 | if (len < 0) /* size_t not fitting an compat_ssize_t .. */ | |
1198 | goto out; | |
1199 | tot_len += len; | |
1200 | if (tot_len < tmp) /* maths overflow on the compat_ssize_t */ | |
1201 | goto out; | |
1202 | vector->iov_base = compat_ptr(buf); | |
1203 | vector->iov_len = (compat_size_t) len; | |
1204 | uvector++; | |
1205 | vector++; | |
1206 | } | |
1207 | if (tot_len == 0) { | |
1208 | ret = 0; | |
1209 | goto out; | |
1210 | } | |
1211 | ||
1212 | ret = rw_verify_area(type, file, pos, tot_len); | |
e28cc715 | 1213 | if (ret < 0) |
1da177e4 LT |
1214 | goto out; |
1215 | ||
1216 | fnv = NULL; | |
1217 | if (type == READ) { | |
1218 | fn = file->f_op->read; | |
1219 | fnv = file->f_op->readv; | |
1220 | } else { | |
1221 | fn = (io_fn_t)file->f_op->write; | |
1222 | fnv = file->f_op->writev; | |
1223 | } | |
1224 | if (fnv) { | |
1225 | ret = fnv(file, iov, nr_segs, pos); | |
1226 | goto out; | |
1227 | } | |
1228 | ||
1229 | /* Do it by hand, with file-ops */ | |
1230 | ret = 0; | |
1231 | vector = iov; | |
1232 | while (nr_segs > 0) { | |
1233 | void __user * base; | |
1234 | size_t len; | |
1235 | ssize_t nr; | |
1236 | ||
1237 | base = vector->iov_base; | |
1238 | len = vector->iov_len; | |
1239 | vector++; | |
1240 | nr_segs--; | |
1241 | ||
1242 | nr = fn(file, base, len, pos); | |
1243 | ||
1244 | if (nr < 0) { | |
1245 | if (!ret) ret = nr; | |
1246 | break; | |
1247 | } | |
1248 | ret += nr; | |
1249 | if (nr != len) | |
1250 | break; | |
1251 | } | |
1252 | out: | |
1253 | if (iov != iovstack) | |
1254 | kfree(iov); | |
0eeca283 RL |
1255 | if ((ret + (type == READ)) > 0) { |
1256 | struct dentry *dentry = file->f_dentry; | |
1257 | if (type == READ) | |
1258 | fsnotify_access(dentry); | |
1259 | else | |
1260 | fsnotify_modify(dentry); | |
1261 | } | |
1da177e4 LT |
1262 | return ret; |
1263 | } | |
1264 | ||
1265 | asmlinkage ssize_t | |
1266 | compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1267 | { | |
1268 | struct file *file; | |
1269 | ssize_t ret = -EBADF; | |
1270 | ||
1271 | file = fget(fd); | |
1272 | if (!file) | |
1273 | return -EBADF; | |
1274 | ||
1275 | if (!(file->f_mode & FMODE_READ)) | |
1276 | goto out; | |
1277 | ||
1278 | ret = -EINVAL; | |
1279 | if (!file->f_op || (!file->f_op->readv && !file->f_op->read)) | |
1280 | goto out; | |
1281 | ||
1282 | ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos); | |
1283 | ||
1284 | out: | |
1285 | fput(file); | |
1286 | return ret; | |
1287 | } | |
1288 | ||
1289 | asmlinkage ssize_t | |
1290 | compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen) | |
1291 | { | |
1292 | struct file *file; | |
1293 | ssize_t ret = -EBADF; | |
1294 | ||
1295 | file = fget(fd); | |
1296 | if (!file) | |
1297 | return -EBADF; | |
1298 | if (!(file->f_mode & FMODE_WRITE)) | |
1299 | goto out; | |
1300 | ||
1301 | ret = -EINVAL; | |
1302 | if (!file->f_op || (!file->f_op->writev && !file->f_op->write)) | |
1303 | goto out; | |
1304 | ||
1305 | ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos); | |
1306 | ||
1307 | out: | |
1308 | fput(file); | |
1309 | return ret; | |
1310 | } | |
1311 | ||
e922efc3 MS |
1312 | /* |
1313 | * Exactly like fs/open.c:sys_open(), except that it doesn't set the | |
1314 | * O_LARGEFILE flag. | |
1315 | */ | |
1316 | asmlinkage long | |
1317 | compat_sys_open(const char __user *filename, int flags, int mode) | |
1318 | { | |
5590ff0d UD |
1319 | return do_sys_open(AT_FDCWD, filename, flags, mode); |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Exactly like fs/open.c:sys_openat(), except that it doesn't set the | |
1324 | * O_LARGEFILE flag. | |
1325 | */ | |
1326 | asmlinkage long | |
1327 | compat_sys_openat(int dfd, const char __user *filename, int flags, int mode) | |
1328 | { | |
1329 | return do_sys_open(dfd, filename, flags, mode); | |
e922efc3 MS |
1330 | } |
1331 | ||
1da177e4 LT |
1332 | /* |
1333 | * compat_count() counts the number of arguments/envelopes. It is basically | |
1334 | * a copy of count() from fs/exec.c, except that it works with 32 bit argv | |
1335 | * and envp pointers. | |
1336 | */ | |
1337 | static int compat_count(compat_uptr_t __user *argv, int max) | |
1338 | { | |
1339 | int i = 0; | |
1340 | ||
1341 | if (argv != NULL) { | |
1342 | for (;;) { | |
1343 | compat_uptr_t p; | |
1344 | ||
1345 | if (get_user(p, argv)) | |
1346 | return -EFAULT; | |
1347 | if (!p) | |
1348 | break; | |
1349 | argv++; | |
1350 | if(++i > max) | |
1351 | return -E2BIG; | |
1352 | } | |
1353 | } | |
1354 | return i; | |
1355 | } | |
1356 | ||
1357 | /* | |
1358 | * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c | |
1359 | * except that it works with 32 bit argv and envp pointers. | |
1360 | */ | |
1361 | static int compat_copy_strings(int argc, compat_uptr_t __user *argv, | |
1362 | struct linux_binprm *bprm) | |
1363 | { | |
1364 | struct page *kmapped_page = NULL; | |
1365 | char *kaddr = NULL; | |
1366 | int ret; | |
1367 | ||
1368 | while (argc-- > 0) { | |
1369 | compat_uptr_t str; | |
1370 | int len; | |
1371 | unsigned long pos; | |
1372 | ||
1373 | if (get_user(str, argv+argc) || | |
1374 | !(len = strnlen_user(compat_ptr(str), bprm->p))) { | |
1375 | ret = -EFAULT; | |
1376 | goto out; | |
1377 | } | |
1378 | ||
1379 | if (bprm->p < len) { | |
1380 | ret = -E2BIG; | |
1381 | goto out; | |
1382 | } | |
1383 | ||
1384 | bprm->p -= len; | |
1385 | /* XXX: add architecture specific overflow check here. */ | |
1386 | pos = bprm->p; | |
1387 | ||
1388 | while (len > 0) { | |
1389 | int i, new, err; | |
1390 | int offset, bytes_to_copy; | |
1391 | struct page *page; | |
1392 | ||
1393 | offset = pos % PAGE_SIZE; | |
1394 | i = pos/PAGE_SIZE; | |
1395 | page = bprm->page[i]; | |
1396 | new = 0; | |
1397 | if (!page) { | |
1398 | page = alloc_page(GFP_HIGHUSER); | |
1399 | bprm->page[i] = page; | |
1400 | if (!page) { | |
1401 | ret = -ENOMEM; | |
1402 | goto out; | |
1403 | } | |
1404 | new = 1; | |
1405 | } | |
1406 | ||
1407 | if (page != kmapped_page) { | |
1408 | if (kmapped_page) | |
1409 | kunmap(kmapped_page); | |
1410 | kmapped_page = page; | |
1411 | kaddr = kmap(kmapped_page); | |
1412 | } | |
1413 | if (new && offset) | |
1414 | memset(kaddr, 0, offset); | |
1415 | bytes_to_copy = PAGE_SIZE - offset; | |
1416 | if (bytes_to_copy > len) { | |
1417 | bytes_to_copy = len; | |
1418 | if (new) | |
1419 | memset(kaddr+offset+len, 0, | |
1420 | PAGE_SIZE-offset-len); | |
1421 | } | |
1422 | err = copy_from_user(kaddr+offset, compat_ptr(str), | |
1423 | bytes_to_copy); | |
1424 | if (err) { | |
1425 | ret = -EFAULT; | |
1426 | goto out; | |
1427 | } | |
1428 | ||
1429 | pos += bytes_to_copy; | |
1430 | str += bytes_to_copy; | |
1431 | len -= bytes_to_copy; | |
1432 | } | |
1433 | } | |
1434 | ret = 0; | |
1435 | out: | |
1436 | if (kmapped_page) | |
1437 | kunmap(kmapped_page); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | #ifdef CONFIG_MMU | |
1442 | ||
1443 | #define free_arg_pages(bprm) do { } while (0) | |
1444 | ||
1445 | #else | |
1446 | ||
1447 | static inline void free_arg_pages(struct linux_binprm *bprm) | |
1448 | { | |
1449 | int i; | |
1450 | ||
1451 | for (i = 0; i < MAX_ARG_PAGES; i++) { | |
1452 | if (bprm->page[i]) | |
1453 | __free_page(bprm->page[i]); | |
1454 | bprm->page[i] = NULL; | |
1455 | } | |
1456 | } | |
1457 | ||
1458 | #endif /* CONFIG_MMU */ | |
1459 | ||
1460 | /* | |
1461 | * compat_do_execve() is mostly a copy of do_execve(), with the exception | |
1462 | * that it processes 32 bit argv and envp pointers. | |
1463 | */ | |
1464 | int compat_do_execve(char * filename, | |
1465 | compat_uptr_t __user *argv, | |
1466 | compat_uptr_t __user *envp, | |
1467 | struct pt_regs * regs) | |
1468 | { | |
1469 | struct linux_binprm *bprm; | |
1470 | struct file *file; | |
1471 | int retval; | |
1472 | int i; | |
1473 | ||
1474 | retval = -ENOMEM; | |
1475 | bprm = kmalloc(sizeof(*bprm), GFP_KERNEL); | |
1476 | if (!bprm) | |
1477 | goto out_ret; | |
1478 | memset(bprm, 0, sizeof(*bprm)); | |
1479 | ||
1480 | file = open_exec(filename); | |
1481 | retval = PTR_ERR(file); | |
1482 | if (IS_ERR(file)) | |
1483 | goto out_kfree; | |
1484 | ||
1485 | sched_exec(); | |
1486 | ||
1487 | bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *); | |
1488 | bprm->file = file; | |
1489 | bprm->filename = filename; | |
1490 | bprm->interp = filename; | |
1491 | bprm->mm = mm_alloc(); | |
1492 | retval = -ENOMEM; | |
1493 | if (!bprm->mm) | |
1494 | goto out_file; | |
1495 | ||
1496 | retval = init_new_context(current, bprm->mm); | |
1497 | if (retval < 0) | |
1498 | goto out_mm; | |
1499 | ||
1500 | bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t)); | |
1501 | if ((retval = bprm->argc) < 0) | |
1502 | goto out_mm; | |
1503 | ||
1504 | bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t)); | |
1505 | if ((retval = bprm->envc) < 0) | |
1506 | goto out_mm; | |
1507 | ||
1508 | retval = security_bprm_alloc(bprm); | |
1509 | if (retval) | |
1510 | goto out; | |
1511 | ||
1512 | retval = prepare_binprm(bprm); | |
1513 | if (retval < 0) | |
1514 | goto out; | |
1515 | ||
1516 | retval = copy_strings_kernel(1, &bprm->filename, bprm); | |
1517 | if (retval < 0) | |
1518 | goto out; | |
1519 | ||
1520 | bprm->exec = bprm->p; | |
1521 | retval = compat_copy_strings(bprm->envc, envp, bprm); | |
1522 | if (retval < 0) | |
1523 | goto out; | |
1524 | ||
1525 | retval = compat_copy_strings(bprm->argc, argv, bprm); | |
1526 | if (retval < 0) | |
1527 | goto out; | |
1528 | ||
1529 | retval = search_binary_handler(bprm, regs); | |
1530 | if (retval >= 0) { | |
1531 | free_arg_pages(bprm); | |
1532 | ||
1533 | /* execve success */ | |
1534 | security_bprm_free(bprm); | |
4a805e86 | 1535 | acct_update_integrals(current); |
1da177e4 LT |
1536 | kfree(bprm); |
1537 | return retval; | |
1538 | } | |
1539 | ||
1540 | out: | |
1541 | /* Something went wrong, return the inode and free the argument pages*/ | |
1542 | for (i = 0 ; i < MAX_ARG_PAGES ; i++) { | |
1543 | struct page * page = bprm->page[i]; | |
1544 | if (page) | |
1545 | __free_page(page); | |
1546 | } | |
1547 | ||
1548 | if (bprm->security) | |
1549 | security_bprm_free(bprm); | |
1550 | ||
1551 | out_mm: | |
1552 | if (bprm->mm) | |
1553 | mmdrop(bprm->mm); | |
1554 | ||
1555 | out_file: | |
1556 | if (bprm->file) { | |
1557 | allow_write_access(bprm->file); | |
1558 | fput(bprm->file); | |
1559 | } | |
1560 | ||
1561 | out_kfree: | |
1562 | kfree(bprm); | |
1563 | ||
1564 | out_ret: | |
1565 | return retval; | |
1566 | } | |
1567 | ||
1568 | #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t)) | |
1569 | ||
1570 | #define ROUND_UP(x,y) (((x)+(y)-1)/(y)) | |
1571 | ||
1572 | /* | |
1573 | * Ooo, nasty. We need here to frob 32-bit unsigned longs to | |
1574 | * 64-bit unsigned longs. | |
1575 | */ | |
858119e1 | 1576 | static |
1da177e4 LT |
1577 | int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1578 | unsigned long *fdset) | |
1579 | { | |
1580 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1581 | if (ufdset) { | |
1582 | unsigned long odd; | |
1583 | ||
1584 | if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t))) | |
1585 | return -EFAULT; | |
1586 | ||
1587 | odd = nr & 1UL; | |
1588 | nr &= ~1UL; | |
1589 | while (nr) { | |
1590 | unsigned long h, l; | |
1591 | __get_user(l, ufdset); | |
1592 | __get_user(h, ufdset+1); | |
1593 | ufdset += 2; | |
1594 | *fdset++ = h << 32 | l; | |
1595 | nr -= 2; | |
1596 | } | |
1597 | if (odd) | |
1598 | __get_user(*fdset, ufdset); | |
1599 | } else { | |
1600 | /* Tricky, must clear full unsigned long in the | |
1601 | * kernel fdset at the end, this makes sure that | |
1602 | * actually happens. | |
1603 | */ | |
1604 | memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t)); | |
1605 | } | |
1606 | return 0; | |
1607 | } | |
1608 | ||
858119e1 | 1609 | static |
1da177e4 LT |
1610 | void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset, |
1611 | unsigned long *fdset) | |
1612 | { | |
1613 | unsigned long odd; | |
1614 | nr = ROUND_UP(nr, __COMPAT_NFDBITS); | |
1615 | ||
1616 | if (!ufdset) | |
1617 | return; | |
1618 | ||
1619 | odd = nr & 1UL; | |
1620 | nr &= ~1UL; | |
1621 | while (nr) { | |
1622 | unsigned long h, l; | |
1623 | l = *fdset++; | |
1624 | h = l >> 32; | |
1625 | __put_user(l, ufdset); | |
1626 | __put_user(h, ufdset+1); | |
1627 | ufdset += 2; | |
1628 | nr -= 2; | |
1629 | } | |
1630 | if (odd) | |
1631 | __put_user(*fdset, ufdset); | |
1632 | } | |
1633 | ||
1634 | ||
1635 | /* | |
1636 | * This is a virtual copy of sys_select from fs/select.c and probably | |
1637 | * should be compared to it from time to time | |
1638 | */ | |
1639 | static void *select_bits_alloc(int size) | |
1640 | { | |
1641 | return kmalloc(6 * size, GFP_KERNEL); | |
1642 | } | |
1643 | ||
1644 | static void select_bits_free(void *bits, int size) | |
1645 | { | |
1646 | kfree(bits); | |
1647 | } | |
1648 | ||
1649 | /* | |
1650 | * We can actually return ERESTARTSYS instead of EINTR, but I'd | |
1651 | * like to be certain this leads to no problems. So I return | |
1652 | * EINTR just for safety. | |
1653 | * | |
1654 | * Update: ERESTARTSYS breaks at least the xview clock binary, so | |
1655 | * I'm trying ERESTARTNOHAND which restart only when you want to. | |
1656 | */ | |
1657 | #define MAX_SELECT_SECONDS \ | |
1658 | ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) | |
1659 | ||
1660 | asmlinkage long | |
1661 | compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp, | |
1662 | compat_ulong_t __user *exp, struct compat_timeval __user *tvp) | |
1663 | { | |
1664 | fd_set_bits fds; | |
1665 | char *bits; | |
1666 | long timeout; | |
1667 | int size, max_fdset, ret = -EINVAL; | |
a4531edd | 1668 | struct fdtable *fdt; |
1da177e4 LT |
1669 | |
1670 | timeout = MAX_SCHEDULE_TIMEOUT; | |
1671 | if (tvp) { | |
1672 | time_t sec, usec; | |
1673 | ||
1674 | if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp)) | |
1675 | || __get_user(sec, &tvp->tv_sec) | |
1676 | || __get_user(usec, &tvp->tv_usec)) { | |
1677 | ret = -EFAULT; | |
1678 | goto out_nofds; | |
1679 | } | |
1680 | ||
1681 | if (sec < 0 || usec < 0) | |
1682 | goto out_nofds; | |
1683 | ||
1684 | if ((unsigned long) sec < MAX_SELECT_SECONDS) { | |
1685 | timeout = ROUND_UP(usec, 1000000/HZ); | |
1686 | timeout += sec * (unsigned long) HZ; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | if (n < 0) | |
1691 | goto out_nofds; | |
1692 | ||
1693 | /* max_fdset can increase, so grab it once to avoid race */ | |
ac5b8b6f | 1694 | rcu_read_lock(); |
a4531edd LT |
1695 | fdt = files_fdtable(current->files); |
1696 | max_fdset = fdt->max_fdset; | |
ac5b8b6f | 1697 | rcu_read_unlock(); |
1da177e4 LT |
1698 | if (n > max_fdset) |
1699 | n = max_fdset; | |
1700 | ||
1701 | /* | |
1702 | * We need 6 bitmaps (in/out/ex for both incoming and outgoing), | |
1703 | * since we used fdset we need to allocate memory in units of | |
1704 | * long-words. | |
1705 | */ | |
1706 | ret = -ENOMEM; | |
1707 | size = FDS_BYTES(n); | |
1708 | bits = select_bits_alloc(size); | |
1709 | if (!bits) | |
1710 | goto out_nofds; | |
1711 | fds.in = (unsigned long *) bits; | |
1712 | fds.out = (unsigned long *) (bits + size); | |
1713 | fds.ex = (unsigned long *) (bits + 2*size); | |
1714 | fds.res_in = (unsigned long *) (bits + 3*size); | |
1715 | fds.res_out = (unsigned long *) (bits + 4*size); | |
1716 | fds.res_ex = (unsigned long *) (bits + 5*size); | |
1717 | ||
1718 | if ((ret = compat_get_fd_set(n, inp, fds.in)) || | |
1719 | (ret = compat_get_fd_set(n, outp, fds.out)) || | |
1720 | (ret = compat_get_fd_set(n, exp, fds.ex))) | |
1721 | goto out; | |
1722 | zero_fd_set(n, fds.res_in); | |
1723 | zero_fd_set(n, fds.res_out); | |
1724 | zero_fd_set(n, fds.res_ex); | |
1725 | ||
1726 | ret = do_select(n, &fds, &timeout); | |
1727 | ||
1728 | if (tvp && !(current->personality & STICKY_TIMEOUTS)) { | |
1729 | time_t sec = 0, usec = 0; | |
1730 | if (timeout) { | |
1731 | sec = timeout / HZ; | |
1732 | usec = timeout % HZ; | |
1733 | usec *= (1000000/HZ); | |
1734 | } | |
1735 | if (put_user(sec, &tvp->tv_sec) || | |
1736 | put_user(usec, &tvp->tv_usec)) | |
1737 | ret = -EFAULT; | |
1738 | } | |
1739 | ||
1740 | if (ret < 0) | |
1741 | goto out; | |
1742 | if (!ret) { | |
1743 | ret = -ERESTARTNOHAND; | |
1744 | if (signal_pending(current)) | |
1745 | goto out; | |
1746 | ret = 0; | |
1747 | } | |
1748 | ||
1749 | compat_set_fd_set(n, inp, fds.res_in); | |
1750 | compat_set_fd_set(n, outp, fds.res_out); | |
1751 | compat_set_fd_set(n, exp, fds.res_ex); | |
1752 | ||
1753 | out: | |
1754 | select_bits_free(bits, size); | |
1755 | out_nofds: | |
1756 | return ret; | |
1757 | } | |
1758 | ||
1759 | #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE) | |
1760 | /* Stuff for NFS server syscalls... */ | |
1761 | struct compat_nfsctl_svc { | |
1762 | u16 svc32_port; | |
1763 | s32 svc32_nthreads; | |
1764 | }; | |
1765 | ||
1766 | struct compat_nfsctl_client { | |
1767 | s8 cl32_ident[NFSCLNT_IDMAX+1]; | |
1768 | s32 cl32_naddr; | |
1769 | struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX]; | |
1770 | s32 cl32_fhkeytype; | |
1771 | s32 cl32_fhkeylen; | |
1772 | u8 cl32_fhkey[NFSCLNT_KEYMAX]; | |
1773 | }; | |
1774 | ||
1775 | struct compat_nfsctl_export { | |
1776 | char ex32_client[NFSCLNT_IDMAX+1]; | |
1777 | char ex32_path[NFS_MAXPATHLEN+1]; | |
1778 | compat_dev_t ex32_dev; | |
1779 | compat_ino_t ex32_ino; | |
1780 | compat_int_t ex32_flags; | |
202e5979 SR |
1781 | __compat_uid_t ex32_anon_uid; |
1782 | __compat_gid_t ex32_anon_gid; | |
1da177e4 LT |
1783 | }; |
1784 | ||
1785 | struct compat_nfsctl_fdparm { | |
1786 | struct sockaddr gd32_addr; | |
1787 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1788 | compat_int_t gd32_version; | |
1789 | }; | |
1790 | ||
1791 | struct compat_nfsctl_fsparm { | |
1792 | struct sockaddr gd32_addr; | |
1793 | s8 gd32_path[NFS_MAXPATHLEN+1]; | |
1794 | compat_int_t gd32_maxlen; | |
1795 | }; | |
1796 | ||
1797 | struct compat_nfsctl_arg { | |
1798 | compat_int_t ca32_version; /* safeguard */ | |
1799 | union { | |
1800 | struct compat_nfsctl_svc u32_svc; | |
1801 | struct compat_nfsctl_client u32_client; | |
1802 | struct compat_nfsctl_export u32_export; | |
1803 | struct compat_nfsctl_fdparm u32_getfd; | |
1804 | struct compat_nfsctl_fsparm u32_getfs; | |
1805 | } u; | |
1806 | #define ca32_svc u.u32_svc | |
1807 | #define ca32_client u.u32_client | |
1808 | #define ca32_export u.u32_export | |
1809 | #define ca32_getfd u.u32_getfd | |
1810 | #define ca32_getfs u.u32_getfs | |
1811 | }; | |
1812 | ||
1813 | union compat_nfsctl_res { | |
1814 | __u8 cr32_getfh[NFS_FHSIZE]; | |
1815 | struct knfsd_fh cr32_getfs; | |
1816 | }; | |
1817 | ||
1818 | static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1819 | { | |
1820 | int err; | |
1821 | ||
1822 | err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)); | |
1823 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1824 | err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port); | |
1825 | err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads); | |
1826 | return (err) ? -EFAULT : 0; | |
1827 | } | |
1828 | ||
1829 | static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1830 | { | |
1831 | int err; | |
1832 | ||
1833 | err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client)); | |
1834 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1835 | err |= __copy_from_user(&karg->ca_client.cl_ident[0], | |
1836 | &arg->ca32_client.cl32_ident[0], | |
1837 | NFSCLNT_IDMAX); | |
1838 | err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr); | |
1839 | err |= __copy_from_user(&karg->ca_client.cl_addrlist[0], | |
1840 | &arg->ca32_client.cl32_addrlist[0], | |
1841 | (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)); | |
1842 | err |= __get_user(karg->ca_client.cl_fhkeytype, | |
1843 | &arg->ca32_client.cl32_fhkeytype); | |
1844 | err |= __get_user(karg->ca_client.cl_fhkeylen, | |
1845 | &arg->ca32_client.cl32_fhkeylen); | |
1846 | err |= __copy_from_user(&karg->ca_client.cl_fhkey[0], | |
1847 | &arg->ca32_client.cl32_fhkey[0], | |
1848 | NFSCLNT_KEYMAX); | |
1849 | ||
1850 | return (err) ? -EFAULT : 0; | |
1851 | } | |
1852 | ||
1853 | static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1854 | { | |
1855 | int err; | |
1856 | ||
1857 | err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export)); | |
1858 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1859 | err |= __copy_from_user(&karg->ca_export.ex_client[0], | |
1860 | &arg->ca32_export.ex32_client[0], | |
1861 | NFSCLNT_IDMAX); | |
1862 | err |= __copy_from_user(&karg->ca_export.ex_path[0], | |
1863 | &arg->ca32_export.ex32_path[0], | |
1864 | NFS_MAXPATHLEN); | |
1865 | err |= __get_user(karg->ca_export.ex_dev, | |
1866 | &arg->ca32_export.ex32_dev); | |
1867 | err |= __get_user(karg->ca_export.ex_ino, | |
1868 | &arg->ca32_export.ex32_ino); | |
1869 | err |= __get_user(karg->ca_export.ex_flags, | |
1870 | &arg->ca32_export.ex32_flags); | |
1871 | err |= __get_user(karg->ca_export.ex_anon_uid, | |
1872 | &arg->ca32_export.ex32_anon_uid); | |
1873 | err |= __get_user(karg->ca_export.ex_anon_gid, | |
1874 | &arg->ca32_export.ex32_anon_gid); | |
1875 | SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid); | |
1876 | SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid); | |
1877 | ||
1878 | return (err) ? -EFAULT : 0; | |
1879 | } | |
1880 | ||
1881 | static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1882 | { | |
1883 | int err; | |
1884 | ||
1885 | err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd)); | |
1886 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1887 | err |= __copy_from_user(&karg->ca_getfd.gd_addr, | |
1888 | &arg->ca32_getfd.gd32_addr, | |
1889 | (sizeof(struct sockaddr))); | |
1890 | err |= __copy_from_user(&karg->ca_getfd.gd_path, | |
1891 | &arg->ca32_getfd.gd32_path, | |
1892 | (NFS_MAXPATHLEN+1)); | |
1893 | err |= __get_user(karg->ca_getfd.gd_version, | |
1894 | &arg->ca32_getfd.gd32_version); | |
1895 | ||
1896 | return (err) ? -EFAULT : 0; | |
1897 | } | |
1898 | ||
1899 | static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg) | |
1900 | { | |
1901 | int err; | |
1902 | ||
1903 | err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs)); | |
1904 | err |= get_user(karg->ca_version, &arg->ca32_version); | |
1905 | err |= __copy_from_user(&karg->ca_getfs.gd_addr, | |
1906 | &arg->ca32_getfs.gd32_addr, | |
1907 | (sizeof(struct sockaddr))); | |
1908 | err |= __copy_from_user(&karg->ca_getfs.gd_path, | |
1909 | &arg->ca32_getfs.gd32_path, | |
1910 | (NFS_MAXPATHLEN+1)); | |
1911 | err |= __get_user(karg->ca_getfs.gd_maxlen, | |
1912 | &arg->ca32_getfs.gd32_maxlen); | |
1913 | ||
1914 | return (err) ? -EFAULT : 0; | |
1915 | } | |
1916 | ||
1917 | /* This really doesn't need translations, we are only passing | |
1918 | * back a union which contains opaque nfs file handle data. | |
1919 | */ | |
1920 | static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res) | |
1921 | { | |
1922 | int err; | |
1923 | ||
1924 | err = copy_to_user(res, kres, sizeof(*res)); | |
1925 | ||
1926 | return (err) ? -EFAULT : 0; | |
1927 | } | |
1928 | ||
1929 | asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg, | |
1930 | union compat_nfsctl_res __user *res) | |
1931 | { | |
1932 | struct nfsctl_arg *karg; | |
1933 | union nfsctl_res *kres; | |
1934 | mm_segment_t oldfs; | |
1935 | int err; | |
1936 | ||
1937 | karg = kmalloc(sizeof(*karg), GFP_USER); | |
1938 | kres = kmalloc(sizeof(*kres), GFP_USER); | |
1939 | if(!karg || !kres) { | |
1940 | err = -ENOMEM; | |
1941 | goto done; | |
1942 | } | |
1943 | ||
1944 | switch(cmd) { | |
1945 | case NFSCTL_SVC: | |
1946 | err = compat_nfs_svc_trans(karg, arg); | |
1947 | break; | |
1948 | ||
1949 | case NFSCTL_ADDCLIENT: | |
1950 | err = compat_nfs_clnt_trans(karg, arg); | |
1951 | break; | |
1952 | ||
1953 | case NFSCTL_DELCLIENT: | |
1954 | err = compat_nfs_clnt_trans(karg, arg); | |
1955 | break; | |
1956 | ||
1957 | case NFSCTL_EXPORT: | |
1958 | case NFSCTL_UNEXPORT: | |
1959 | err = compat_nfs_exp_trans(karg, arg); | |
1960 | break; | |
1961 | ||
1962 | case NFSCTL_GETFD: | |
1963 | err = compat_nfs_getfd_trans(karg, arg); | |
1964 | break; | |
1965 | ||
1966 | case NFSCTL_GETFS: | |
1967 | err = compat_nfs_getfs_trans(karg, arg); | |
1968 | break; | |
1969 | ||
1970 | default: | |
1971 | err = -EINVAL; | |
1972 | goto done; | |
1973 | } | |
1974 | ||
1975 | oldfs = get_fs(); | |
1976 | set_fs(KERNEL_DS); | |
1977 | /* The __user pointer casts are valid because of the set_fs() */ | |
1978 | err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres); | |
1979 | set_fs(oldfs); | |
1980 | ||
1981 | if (err) | |
1982 | goto done; | |
1983 | ||
1984 | if((cmd == NFSCTL_GETFD) || | |
1985 | (cmd == NFSCTL_GETFS)) | |
1986 | err = compat_nfs_getfh_res_trans(kres, res); | |
1987 | ||
1988 | done: | |
1989 | kfree(karg); | |
1990 | kfree(kres); | |
1991 | return err; | |
1992 | } | |
1993 | #else /* !NFSD */ | |
1994 | long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2) | |
1995 | { | |
1996 | return sys_ni_syscall(); | |
1997 | } | |
1998 | #endif |