blob: e1a56ade803b09b48e047e24192a3649ed0348d5 [file] [log] [blame]
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
3 *
4 * Copyright (C) 2000 VA Linux Co
5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +090011 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 */
13
14#include <linux/kernel.h>
15#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/types.h>
17#include <linux/file.h>
18#include <linux/icmpv6.h>
19#include <linux/socket.h>
20#include <linux/syscalls.h>
21#include <linux/filter.h>
22#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/security.h>
24
25#include <net/scm.h>
26#include <net/sock.h>
David L Stevensdae50292008-04-27 01:06:07 -070027#include <net/ip.h>
28#include <net/ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <asm/uaccess.h>
30#include <net/compat.h>
31
32static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
33 struct compat_iovec __user *uiov32,
34 int niov)
35{
36 int tot_len = 0;
37
Stephen Hemmingere71a4782007-04-10 20:10:33 -070038 while (niov > 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 compat_uptr_t buf;
40 compat_size_t len;
41
Stephen Hemmingere71a4782007-04-10 20:10:33 -070042 if (get_user(len, &uiov32->iov_len) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 get_user(buf, &uiov32->iov_base)) {
44 tot_len = -EFAULT;
45 break;
46 }
47 tot_len += len;
48 kiov->iov_base = compat_ptr(buf);
49 kiov->iov_len = (__kernel_size_t) len;
50 uiov32++;
51 kiov++;
52 niov--;
53 }
54 return tot_len;
55}
56
57int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
58{
59 compat_uptr_t tmp1, tmp2, tmp3;
60
61 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
62 __get_user(tmp1, &umsg->msg_name) ||
63 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
64 __get_user(tmp2, &umsg->msg_iov) ||
65 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
66 __get_user(tmp3, &umsg->msg_control) ||
67 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
68 __get_user(kmsg->msg_flags, &umsg->msg_flags))
69 return -EFAULT;
70 kmsg->msg_name = compat_ptr(tmp1);
71 kmsg->msg_iov = compat_ptr(tmp2);
72 kmsg->msg_control = compat_ptr(tmp3);
73 return 0;
74}
75
76/* I've named the args so it is easy to tell whose space the pointers are in. */
77int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -070078 struct sockaddr *kern_address, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -070079{
80 int tot_len;
81
Stephen Hemmingere71a4782007-04-10 20:10:33 -070082 if (kern_msg->msg_namelen) {
83 if (mode==VERIFY_READ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 int err = move_addr_to_kernel(kern_msg->msg_name,
85 kern_msg->msg_namelen,
86 kern_address);
Stephen Hemmingere71a4782007-04-10 20:10:33 -070087 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 return err;
89 }
90 kern_msg->msg_name = kern_address;
91 } else
92 kern_msg->msg_name = NULL;
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 tot_len = iov_from_user_compat_to_kern(kern_iov,
95 (struct compat_iovec __user *)kern_msg->msg_iov,
96 kern_msg->msg_iovlen);
Stephen Hemmingere71a4782007-04-10 20:10:33 -070097 if (tot_len >= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 kern_msg->msg_iov = kern_iov;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100 return tot_len;
101}
102
103/* Bleech... */
104#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
105
106#define CMSG_COMPAT_DATA(cmsg) \
107 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
108#define CMSG_COMPAT_SPACE(len) \
109 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
110#define CMSG_COMPAT_LEN(len) \
111 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
112
113#define CMSG_COMPAT_FIRSTHDR(msg) \
114 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
115 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
116 (struct compat_cmsghdr __user *)NULL)
117
118#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
119 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
120 (ucmlen) <= (unsigned long) \
121 ((mhdr)->msg_controllen - \
122 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
123
124static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
125 struct compat_cmsghdr __user *cmsg, int cmsg_len)
126{
127 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
128 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
129 msg->msg_controllen)
130 return NULL;
131 return (struct compat_cmsghdr __user *)ptr;
132}
133
134/* There is a lot of hair here because the alignment rules (and
135 * thus placement) of cmsg headers and length are different for
136 * 32-bit apps. -DaveM
137 */
Al Viro8920e8f2005-09-07 18:28:51 -0700138int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 unsigned char *stackbuf, int stackbuf_size)
140{
141 struct compat_cmsghdr __user *ucmsg;
142 struct cmsghdr *kcmsg, *kcmsg_base;
143 compat_size_t ucmlen;
144 __kernel_size_t kcmlen, tmp;
Al Viro8920e8f2005-09-07 18:28:51 -0700145 int err = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 kcmlen = 0;
148 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
149 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700150 while (ucmsg != NULL) {
151 if (get_user(ucmlen, &ucmsg->cmsg_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 return -EFAULT;
153
154 /* Catch bogons. */
155 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
156 return -EINVAL;
157
158 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
159 CMSG_ALIGN(sizeof(struct cmsghdr)));
Al Viro8920e8f2005-09-07 18:28:51 -0700160 tmp = CMSG_ALIGN(tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 kcmlen += tmp;
162 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
163 }
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700164 if (kcmlen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 return -EINVAL;
166
167 /* The kcmlen holds the 64-bit version of the control length.
168 * It may not be modified as we do not stick it into the kmsg
169 * until we have successfully copied over all of the data
170 * from the user.
171 */
Al Viro8920e8f2005-09-07 18:28:51 -0700172 if (kcmlen > stackbuf_size)
173 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
174 if (kcmsg == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 return -ENOBUFS;
176
177 /* Now copy them over neatly. */
178 memset(kcmsg, 0, kcmlen);
179 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700180 while (ucmsg != NULL) {
Al Viro8920e8f2005-09-07 18:28:51 -0700181 if (__get_user(ucmlen, &ucmsg->cmsg_len))
182 goto Efault;
183 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
184 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
186 CMSG_ALIGN(sizeof(struct cmsghdr)));
Al Viro8920e8f2005-09-07 18:28:51 -0700187 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
188 goto Einval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 kcmsg->cmsg_len = tmp;
Al Viro8920e8f2005-09-07 18:28:51 -0700190 tmp = CMSG_ALIGN(tmp);
191 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
192 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
193 copy_from_user(CMSG_DATA(kcmsg),
194 CMSG_COMPAT_DATA(ucmsg),
195 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
196 goto Efault;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 /* Advance. */
Al Viro8920e8f2005-09-07 18:28:51 -0700199 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
201 }
202
203 /* Ok, looks like we made it. Hook it up and return success. */
204 kmsg->msg_control = kcmsg_base;
205 kmsg->msg_controllen = kcmlen;
206 return 0;
207
Al Viro8920e8f2005-09-07 18:28:51 -0700208Einval:
209 err = -EINVAL;
210Efault:
211 if (kcmsg_base != (struct cmsghdr *)stackbuf)
212 sock_kfree_s(sk, kcmsg_base, kcmlen);
213 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
216int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
217{
218 struct compat_timeval ctv;
Patrick Ohly20d49472009-02-12 05:03:38 +0000219 struct compat_timespec cts[3];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
221 struct compat_cmsghdr cmhdr;
222 int cmlen;
223
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700224 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 kmsg->msg_flags |= MSG_CTRUNC;
226 return 0; /* XXX: return error? check spec. */
227 }
228
Patrick Ohlyd35aac12008-11-12 01:54:56 -0800229 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 struct timeval *tv = (struct timeval *)data;
231 ctv.tv_sec = tv->tv_sec;
232 ctv.tv_usec = tv->tv_usec;
233 data = &ctv;
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700234 len = sizeof(ctv);
235 }
Patrick Ohly20d49472009-02-12 05:03:38 +0000236 if (level == SOL_SOCKET &&
237 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
238 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
239 int i;
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700240 struct timespec *ts = (struct timespec *)data;
Patrick Ohly20d49472009-02-12 05:03:38 +0000241 for (i = 0; i < count; i++) {
242 cts[i].tv_sec = ts[i].tv_sec;
243 cts[i].tv_nsec = ts[i].tv_nsec;
244 }
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700245 data = &cts;
Patrick Ohly20d49472009-02-12 05:03:38 +0000246 len = sizeof(cts[0]) * count;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900247 }
248
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 cmlen = CMSG_COMPAT_LEN(len);
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700250 if (kmsg->msg_controllen < cmlen) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 kmsg->msg_flags |= MSG_CTRUNC;
252 cmlen = kmsg->msg_controllen;
253 }
254 cmhdr.cmsg_level = level;
255 cmhdr.cmsg_type = type;
256 cmhdr.cmsg_len = cmlen;
257
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700258 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return -EFAULT;
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700260 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 return -EFAULT;
262 cmlen = CMSG_COMPAT_SPACE(len);
Wei Yongjun1ac70e72007-12-20 14:36:44 -0800263 if (kmsg->msg_controllen < cmlen)
264 cmlen = kmsg->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 kmsg->msg_control += cmlen;
266 kmsg->msg_controllen -= cmlen;
267 return 0;
268}
269
270void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
271{
272 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
273 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
274 int fdnum = scm->fp->count;
275 struct file **fp = scm->fp->fp;
276 int __user *cmfptr;
277 int err = 0, i;
278
279 if (fdnum < fdmax)
280 fdmax = fdnum;
281
282 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
283 int new_fd;
284 err = security_file_receive(fp[i]);
285 if (err)
286 break;
Ulrich Drepper4a195422007-07-15 23:40:34 -0700287 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
288 ? O_CLOEXEC : 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 if (err < 0)
290 break;
291 new_fd = err;
292 err = put_user(new_fd, cmfptr);
293 if (err) {
294 put_unused_fd(new_fd);
295 break;
296 }
297 /* Bump the usage count and install the file. */
298 get_file(fp[i]);
299 fd_install(new_fd, fp[i]);
300 }
301
302 if (i > 0) {
303 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
Miklos Szeredieffee6a2006-10-09 21:42:14 -0700304 err = put_user(SOL_SOCKET, &cm->cmsg_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 if (!err)
306 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
307 if (!err)
308 err = put_user(cmlen, &cm->cmsg_len);
309 if (!err) {
310 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
311 kmsg->msg_control += cmlen;
312 kmsg->msg_controllen -= cmlen;
313 }
314 }
315 if (i < fdnum)
316 kmsg->msg_flags |= MSG_CTRUNC;
317
318 /*
319 * All of the files that fit in the message have had their
320 * usage counts incremented, so we just free the list.
321 */
322 __scm_destroy(scm);
323}
324
325/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 * A struct sock_filter is architecture independent.
327 */
328struct compat_sock_fprog {
329 u16 len;
330 compat_uptr_t filter; /* struct sock_filter * */
331};
332
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800333static int do_set_attach_filter(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700334 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
336 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900337 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 compat_uptr_t ptr;
339 u16 len;
340
341 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
342 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
343 __get_user(len, &fprog32->len) ||
344 __get_user(ptr, &fprog32->filter) ||
345 __put_user(len, &kfprog->len) ||
346 __put_user(compat_ptr(ptr), &kfprog->filter))
347 return -EFAULT;
348
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800349 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 sizeof(struct sock_fprog));
351}
352
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800353static int do_set_sock_timeout(struct socket *sock, int level,
David S. Millerb7058842009-09-30 16:12:20 -0700354 int optname, char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
357 struct timeval ktime;
358 mm_segment_t old_fs;
359 int err;
360
361 if (optlen < sizeof(*up))
362 return -EINVAL;
363 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
364 __get_user(ktime.tv_sec, &up->tv_sec) ||
365 __get_user(ktime.tv_usec, &up->tv_usec))
366 return -EFAULT;
367 old_fs = get_fs();
368 set_fs(KERNEL_DS);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800369 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 set_fs(old_fs);
371
372 return err;
373}
374
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800375static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700376 char __user *optval, unsigned int optlen)
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800377{
378 if (optname == SO_ATTACH_FILTER)
379 return do_set_attach_filter(sock, level, optname,
380 optval, optlen);
381 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
382 return do_set_sock_timeout(sock, level, optname, optval, optlen);
383
384 return sock_setsockopt(sock, level, optname, optval, optlen);
385}
386
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700388 char __user *optval, unsigned int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800390 int err;
391 struct socket *sock;
392
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800393 if ((sock = sockfd_lookup(fd, &err))!=NULL)
394 {
395 err = security_socket_setsockopt(sock,level,optname);
396 if (err) {
397 sockfd_put(sock);
398 return err;
399 }
400
401 if (level == SOL_SOCKET)
402 err = compat_sock_setsockopt(sock, level,
403 optname, optval, optlen);
404 else if (sock->ops->compat_setsockopt)
405 err = sock->ops->compat_setsockopt(sock, level,
406 optname, optval, optlen);
407 else
408 err = sock->ops->setsockopt(sock, level,
409 optname, optval, optlen);
410 sockfd_put(sock);
411 }
412 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413}
414
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800415static int do_get_sock_timeout(struct socket *sock, int level, int optname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 char __user *optval, int __user *optlen)
417{
418 struct compat_timeval __user *up;
419 struct timeval ktime;
420 mm_segment_t old_fs;
421 int len, err;
422
423 up = (struct compat_timeval __user *) optval;
424 if (get_user(len, optlen))
425 return -EFAULT;
426 if (len < sizeof(*up))
427 return -EINVAL;
428 len = sizeof(ktime);
429 old_fs = get_fs();
430 set_fs(KERNEL_DS);
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800431 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 set_fs(old_fs);
433
434 if (!err) {
435 if (put_user(sizeof(*up), optlen) ||
436 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
437 __put_user(ktime.tv_sec, &up->tv_sec) ||
438 __put_user(ktime.tv_usec, &up->tv_usec))
439 err = -EFAULT;
440 }
441 return err;
442}
443
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800444static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
445 char __user *optval, int __user *optlen)
446{
447 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
448 return do_get_sock_timeout(sock, level, optname, optval, optlen);
449 return sock_getsockopt(sock, level, optname, optval, optlen);
450}
451
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800452int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
453{
454 struct compat_timeval __user *ctv =
455 (struct compat_timeval __user*) userstamp;
456 int err = -ENOENT;
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700457 struct timeval tv;
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800458
459 if (!sock_flag(sk, SOCK_TIMESTAMP))
Patrick Ohly20d49472009-02-12 05:03:38 +0000460 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700461 tv = ktime_to_timeval(sk->sk_stamp);
462 if (tv.tv_sec == -1)
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800463 return err;
Eric Dumazetb7aa0bf2007-04-19 16:16:32 -0700464 if (tv.tv_sec == 0) {
465 sk->sk_stamp = ktime_get_real();
466 tv = ktime_to_timeval(sk->sk_stamp);
467 }
468 err = 0;
469 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
470 put_user(tv.tv_usec, &ctv->tv_usec))
Shaun Pereiraf0ac2612006-03-21 23:59:39 -0800471 err = -EFAULT;
472 return err;
473}
474EXPORT_SYMBOL(compat_sock_get_timestamp);
475
Eric Dumazetae40eb12007-03-18 17:33:16 -0700476int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
477{
478 struct compat_timespec __user *ctv =
479 (struct compat_timespec __user*) userstamp;
480 int err = -ENOENT;
481 struct timespec ts;
482
483 if (!sock_flag(sk, SOCK_TIMESTAMP))
Patrick Ohly20d49472009-02-12 05:03:38 +0000484 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
Eric Dumazetae40eb12007-03-18 17:33:16 -0700485 ts = ktime_to_timespec(sk->sk_stamp);
486 if (ts.tv_sec == -1)
487 return err;
488 if (ts.tv_sec == 0) {
489 sk->sk_stamp = ktime_get_real();
490 ts = ktime_to_timespec(sk->sk_stamp);
491 }
492 err = 0;
493 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
494 put_user(ts.tv_nsec, &ctv->tv_nsec))
495 err = -EFAULT;
496 return err;
497}
498EXPORT_SYMBOL(compat_sock_get_timestampns);
499
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
501 char __user *optval, int __user *optlen)
502{
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800503 int err;
504 struct socket *sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800506 if ((sock = sockfd_lookup(fd, &err))!=NULL)
507 {
508 err = security_socket_getsockopt(sock, level,
509 optname);
510 if (err) {
511 sockfd_put(sock);
512 return err;
513 }
514
515 if (level == SOL_SOCKET)
516 err = compat_sock_getsockopt(sock, level,
517 optname, optval, optlen);
518 else if (sock->ops->compat_getsockopt)
519 err = sock->ops->compat_getsockopt(sock, level,
520 optname, optval, optlen);
521 else
522 err = sock->ops->getsockopt(sock, level,
523 optname, optval, optlen);
524 sockfd_put(sock);
525 }
526 return err;
527}
David L Stevensdae50292008-04-27 01:06:07 -0700528
529struct compat_group_req {
530 __u32 gr_interface;
531 struct __kernel_sockaddr_storage gr_group
532 __attribute__ ((aligned(4)));
533} __attribute__ ((packed));
534
535struct compat_group_source_req {
536 __u32 gsr_interface;
537 struct __kernel_sockaddr_storage gsr_group
538 __attribute__ ((aligned(4)));
539 struct __kernel_sockaddr_storage gsr_source
540 __attribute__ ((aligned(4)));
541} __attribute__ ((packed));
542
543struct compat_group_filter {
544 __u32 gf_interface;
545 struct __kernel_sockaddr_storage gf_group
546 __attribute__ ((aligned(4)));
547 __u32 gf_fmode;
548 __u32 gf_numsrc;
549 struct __kernel_sockaddr_storage gf_slist[1]
550 __attribute__ ((aligned(4)));
551} __attribute__ ((packed));
552
David L Stevensbe666e02008-04-29 03:23:00 -0700553#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
554 sizeof(struct __kernel_sockaddr_storage))
555
David L Stevensdae50292008-04-27 01:06:07 -0700556
557int compat_mc_setsockopt(struct sock *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -0700558 char __user *optval, unsigned int optlen,
559 int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int))
David L Stevensdae50292008-04-27 01:06:07 -0700560{
561 char __user *koptval = optval;
562 int koptlen = optlen;
563
564 switch (optname) {
565 case MCAST_JOIN_GROUP:
566 case MCAST_LEAVE_GROUP:
567 {
568 struct compat_group_req __user *gr32 = (void *)optval;
569 struct group_req __user *kgr =
570 compat_alloc_user_space(sizeof(struct group_req));
571 u32 interface;
572
573 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
574 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
575 __get_user(interface, &gr32->gr_interface) ||
576 __put_user(interface, &kgr->gr_interface) ||
577 copy_in_user(&kgr->gr_group, &gr32->gr_group,
578 sizeof(kgr->gr_group)))
579 return -EFAULT;
580 koptval = (char __user *)kgr;
581 koptlen = sizeof(struct group_req);
582 break;
583 }
584 case MCAST_JOIN_SOURCE_GROUP:
585 case MCAST_LEAVE_SOURCE_GROUP:
586 case MCAST_BLOCK_SOURCE:
587 case MCAST_UNBLOCK_SOURCE:
588 {
589 struct compat_group_source_req __user *gsr32 = (void *)optval;
David L Stevensbe666e02008-04-29 03:23:00 -0700590 struct group_source_req __user *kgsr = compat_alloc_user_space(
David L Stevensdae50292008-04-27 01:06:07 -0700591 sizeof(struct group_source_req));
592 u32 interface;
593
594 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
595 !access_ok(VERIFY_WRITE, kgsr,
596 sizeof(struct group_source_req)) ||
597 __get_user(interface, &gsr32->gsr_interface) ||
598 __put_user(interface, &kgsr->gsr_interface) ||
599 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
600 sizeof(kgsr->gsr_group)) ||
601 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
602 sizeof(kgsr->gsr_source)))
603 return -EFAULT;
604 koptval = (char __user *)kgsr;
605 koptlen = sizeof(struct group_source_req);
606 break;
607 }
608 case MCAST_MSFILTER:
609 {
610 struct compat_group_filter __user *gf32 = (void *)optval;
David L Stevensbe666e02008-04-29 03:23:00 -0700611 struct group_filter __user *kgf;
David L Stevensdae50292008-04-27 01:06:07 -0700612 u32 interface, fmode, numsrc;
613
David L Stevensbe666e02008-04-29 03:23:00 -0700614 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
David L Stevensdae50292008-04-27 01:06:07 -0700615 __get_user(interface, &gf32->gf_interface) ||
616 __get_user(fmode, &gf32->gf_fmode) ||
617 __get_user(numsrc, &gf32->gf_numsrc))
618 return -EFAULT;
619 koptlen = optlen + sizeof(struct group_filter) -
620 sizeof(struct compat_group_filter);
621 if (koptlen < GROUP_FILTER_SIZE(numsrc))
622 return -EINVAL;
623 kgf = compat_alloc_user_space(koptlen);
624 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
625 __put_user(interface, &kgf->gf_interface) ||
626 __put_user(fmode, &kgf->gf_fmode) ||
627 __put_user(numsrc, &kgf->gf_numsrc) ||
628 copy_in_user(&kgf->gf_group, &gf32->gf_group,
629 sizeof(kgf->gf_group)) ||
David L Stevensbe666e02008-04-29 03:23:00 -0700630 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
David L Stevensdae50292008-04-27 01:06:07 -0700631 numsrc * sizeof(kgf->gf_slist[0]))))
632 return -EFAULT;
633 koptval = (char __user *)kgf;
634 break;
635 }
636
637 default:
638 break;
639 }
640 return setsockopt(sock, level, optname, koptval, koptlen);
641}
642
643EXPORT_SYMBOL(compat_mc_setsockopt);
644
David L Stevens42908c62008-04-29 03:23:22 -0700645int compat_mc_getsockopt(struct sock *sock, int level, int optname,
646 char __user *optval, int __user *optlen,
647 int (*getsockopt)(struct sock *,int,int,char __user *,int __user *))
648{
649 struct compat_group_filter __user *gf32 = (void *)optval;
650 struct group_filter __user *kgf;
651 int __user *koptlen;
652 u32 interface, fmode, numsrc;
653 int klen, ulen, err;
654
655 if (optname != MCAST_MSFILTER)
656 return getsockopt(sock, level, optname, optval, optlen);
657
658 koptlen = compat_alloc_user_space(sizeof(*koptlen));
659 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
660 __get_user(ulen, optlen))
661 return -EFAULT;
662
663 /* adjust len for pad */
664 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
665
666 if (klen < GROUP_FILTER_SIZE(0))
667 return -EINVAL;
668
669 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
670 __put_user(klen, koptlen))
671 return -EFAULT;
672
673 /* have to allow space for previous compat_alloc_user_space, too */
674 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
675
676 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
677 __get_user(interface, &gf32->gf_interface) ||
678 __get_user(fmode, &gf32->gf_fmode) ||
679 __get_user(numsrc, &gf32->gf_numsrc) ||
680 __put_user(interface, &kgf->gf_interface) ||
681 __put_user(fmode, &kgf->gf_fmode) ||
682 __put_user(numsrc, &kgf->gf_numsrc) ||
683 copy_in_user(&kgf->gf_group,&gf32->gf_group,sizeof(kgf->gf_group)))
684 return -EFAULT;
685
686 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
687 if (err)
688 return err;
689
690 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
691 __get_user(klen, koptlen))
692 return -EFAULT;
693
694 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
695
696 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
697 __put_user(ulen, optlen))
698 return -EFAULT;
699
700 if (!access_ok(VERIFY_READ, kgf, klen) ||
701 !access_ok(VERIFY_WRITE, gf32, ulen) ||
702 __get_user(interface, &kgf->gf_interface) ||
703 __get_user(fmode, &kgf->gf_fmode) ||
704 __get_user(numsrc, &kgf->gf_numsrc) ||
705 __put_user(interface, &gf32->gf_interface) ||
706 __put_user(fmode, &gf32->gf_fmode) ||
707 __put_user(numsrc, &gf32->gf_numsrc))
708 return -EFAULT;
709 if (numsrc) {
710 int copylen;
711
712 klen -= GROUP_FILTER_SIZE(0);
713 copylen = numsrc * sizeof(gf32->gf_slist[0]);
714 if (copylen > klen)
715 copylen = klen;
716 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
717 return -EFAULT;
718 }
719 return err;
720}
721
722EXPORT_SYMBOL(compat_mc_getsockopt);
723
David L Stevensdae50292008-04-27 01:06:07 -0700724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725/* Argument list sizes for compat_sys_socketcall */
726#define AL(x) ((x) * sizeof(u32))
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700727static unsigned char nas[20]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -0700729 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700730 AL(4),AL(5)};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731#undef AL
732
733asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
734{
735 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
736}
737
738asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
739{
740 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
741}
742
Johannes Berg1dacc762009-07-01 11:26:02 +0000743asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags)
744{
745 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
746}
747
748asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
749 unsigned flags, struct sockaddr __user *addr,
750 int __user *addrlen)
751{
752 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
753}
754
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700755asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
756 unsigned vlen, unsigned int flags,
757 struct timespec __user *timeout)
758{
759 int datagrams;
760 struct timespec ktspec;
Jean-Mickael Guerin5b231362009-12-01 07:52:16 +0000761 struct compat_timespec __user *utspec;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700762
Jean-Mickael Guerin5b231362009-12-01 07:52:16 +0000763 if (timeout == NULL)
764 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
765 flags | MSG_CMSG_COMPAT, NULL);
766
767 utspec = (struct compat_timespec __user *)timeout;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700768 if (get_user(ktspec.tv_sec, &utspec->tv_sec) ||
769 get_user(ktspec.tv_nsec, &utspec->tv_nsec))
770 return -EFAULT;
771
772 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
773 flags | MSG_CMSG_COMPAT, &ktspec);
774 if (datagrams > 0 &&
775 (put_user(ktspec.tv_sec, &utspec->tv_sec) ||
776 put_user(ktspec.tv_nsec, &utspec->tv_nsec)))
777 datagrams = -EFAULT;
778
779 return datagrams;
780}
781
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
783{
784 int ret;
785 u32 a[6];
786 u32 a0, a1;
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900787
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700788 if (call < SYS_SOCKET || call > SYS_RECVMMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 return -EINVAL;
790 if (copy_from_user(a, args, nas[call]))
791 return -EFAULT;
792 a0 = a[0];
793 a1 = a[1];
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +0900794
Stephen Hemmingere71a4782007-04-10 20:10:33 -0700795 switch (call) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 case SYS_SOCKET:
797 ret = sys_socket(a0, a1, a[2]);
798 break;
799 case SYS_BIND:
800 ret = sys_bind(a0, compat_ptr(a1), a[2]);
801 break;
802 case SYS_CONNECT:
803 ret = sys_connect(a0, compat_ptr(a1), a[2]);
804 break;
805 case SYS_LISTEN:
806 ret = sys_listen(a0, a1);
807 break;
808 case SYS_ACCEPT:
Ulrich Drepperde11def2008-11-19 15:36:14 -0800809 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 break;
811 case SYS_GETSOCKNAME:
812 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
813 break;
814 case SYS_GETPEERNAME:
815 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
816 break;
817 case SYS_SOCKETPAIR:
818 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
819 break;
820 case SYS_SEND:
821 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
822 break;
823 case SYS_SENDTO:
824 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
825 break;
826 case SYS_RECV:
Johannes Berg1dacc762009-07-01 11:26:02 +0000827 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 break;
829 case SYS_RECVFROM:
Johannes Berg1dacc762009-07-01 11:26:02 +0000830 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
831 compat_ptr(a[4]), compat_ptr(a[5]));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 break;
833 case SYS_SHUTDOWN:
834 ret = sys_shutdown(a0,a1);
835 break;
836 case SYS_SETSOCKOPT:
837 ret = compat_sys_setsockopt(a0, a1, a[2],
838 compat_ptr(a[3]), a[4]);
839 break;
840 case SYS_GETSOCKOPT:
841 ret = compat_sys_getsockopt(a0, a1, a[2],
842 compat_ptr(a[3]), compat_ptr(a[4]));
843 break;
844 case SYS_SENDMSG:
845 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
846 break;
847 case SYS_RECVMSG:
848 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
849 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700850 case SYS_RECVMMSG:
851 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
852 compat_ptr(a[4]));
853 break;
Ulrich Drepperde11def2008-11-19 15:36:14 -0800854 case SYS_ACCEPT4:
855 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -0700856 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 default:
858 ret = -EINVAL;
859 break;
860 }
861 return ret;
862}