linux/net/compat.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

858 lines
24 KiB
C

/*
* 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
*
* Copyright (C) 2000 VA Linux Co
* Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
* Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
* Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 2000 Hewlett-Packard Co.
* Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
* Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
*/
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/file.h>
#include <linux/icmpv6.h>
#include <linux/socket.h>
#include <linux/syscalls.h>
#include <linux/filter.h>
#include <linux/compat.h>
#include <linux/security.h>
#include <net/scm.h>
#include <net/sock.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <asm/uaccess.h>
#include <net/compat.h>
static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
struct compat_iovec __user *uiov32,
int niov)
{
int tot_len = 0;
while (niov > 0) {
compat_uptr_t buf;
compat_size_t len;
if (get_user(len, &uiov32->iov_len) ||
get_user(buf, &uiov32->iov_base)) {
tot_len = -EFAULT;
break;
}
tot_len += len;
kiov->iov_base = compat_ptr(buf);
kiov->iov_len = (__kernel_size_t) len;
uiov32++;
kiov++;
niov--;
}
return tot_len;
}
int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
{
compat_uptr_t tmp1, tmp2, tmp3;
if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
__get_user(tmp1, &umsg->msg_name) ||
__get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
__get_user(tmp2, &umsg->msg_iov) ||
__get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
__get_user(tmp3, &umsg->msg_control) ||
__get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
__get_user(kmsg->msg_flags, &umsg->msg_flags))
return -EFAULT;
kmsg->msg_name = compat_ptr(tmp1);
kmsg->msg_iov = compat_ptr(tmp2);
kmsg->msg_control = compat_ptr(tmp3);
return 0;
}
/* I've named the args so it is easy to tell whose space the pointers are in. */
int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
struct sockaddr *kern_address, int mode)
{
int tot_len;
if (kern_msg->msg_namelen) {
if (mode==VERIFY_READ) {
int err = move_addr_to_kernel(kern_msg->msg_name,
kern_msg->msg_namelen,
kern_address);
if (err < 0)
return err;
}
kern_msg->msg_name = kern_address;
} else
kern_msg->msg_name = NULL;
tot_len = iov_from_user_compat_to_kern(kern_iov,
(struct compat_iovec __user *)kern_msg->msg_iov,
kern_msg->msg_iovlen);
if (tot_len >= 0)
kern_msg->msg_iov = kern_iov;
return tot_len;
}
/* Bleech... */
#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
#define CMSG_COMPAT_DATA(cmsg) \
((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
#define CMSG_COMPAT_SPACE(len) \
(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
#define CMSG_COMPAT_LEN(len) \
(CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
#define CMSG_COMPAT_FIRSTHDR(msg) \
(((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
(struct compat_cmsghdr __user *)((msg)->msg_control) : \
(struct compat_cmsghdr __user *)NULL)
#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
((ucmlen) >= sizeof(struct compat_cmsghdr) && \
(ucmlen) <= (unsigned long) \
((mhdr)->msg_controllen - \
((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
struct compat_cmsghdr __user *cmsg, int cmsg_len)
{
char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
msg->msg_controllen)
return NULL;
return (struct compat_cmsghdr __user *)ptr;
}
/* There is a lot of hair here because the alignment rules (and
* thus placement) of cmsg headers and length are different for
* 32-bit apps. -DaveM
*/
int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
unsigned char *stackbuf, int stackbuf_size)
{
struct compat_cmsghdr __user *ucmsg;
struct cmsghdr *kcmsg, *kcmsg_base;
compat_size_t ucmlen;
__kernel_size_t kcmlen, tmp;
int err = -EFAULT;
kcmlen = 0;
kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
while (ucmsg != NULL) {
if (get_user(ucmlen, &ucmsg->cmsg_len))
return -EFAULT;
/* Catch bogons. */
if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
return -EINVAL;
tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
CMSG_ALIGN(sizeof(struct cmsghdr)));
tmp = CMSG_ALIGN(tmp);
kcmlen += tmp;
ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
}
if (kcmlen == 0)
return -EINVAL;
/* The kcmlen holds the 64-bit version of the control length.
* It may not be modified as we do not stick it into the kmsg
* until we have successfully copied over all of the data
* from the user.
*/
if (kcmlen > stackbuf_size)
kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
if (kcmsg == NULL)
return -ENOBUFS;
/* Now copy them over neatly. */
memset(kcmsg, 0, kcmlen);
ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
while (ucmsg != NULL) {
if (__get_user(ucmlen, &ucmsg->cmsg_len))
goto Efault;
if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
goto Einval;
tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
CMSG_ALIGN(sizeof(struct cmsghdr)));
if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
goto Einval;
kcmsg->cmsg_len = tmp;
tmp = CMSG_ALIGN(tmp);
if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
__get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
copy_from_user(CMSG_DATA(kcmsg),
CMSG_COMPAT_DATA(ucmsg),
(ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
goto Efault;
/* Advance. */
kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
}
/* Ok, looks like we made it. Hook it up and return success. */
kmsg->msg_control = kcmsg_base;
kmsg->msg_controllen = kcmlen;
return 0;
Einval:
err = -EINVAL;
Efault:
if (kcmsg_base != (struct cmsghdr *)stackbuf)
sock_kfree_s(sk, kcmsg_base, kcmlen);
return err;
}
int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
{
struct compat_timeval ctv;
struct compat_timespec cts[3];
struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
struct compat_cmsghdr cmhdr;
int cmlen;
if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
kmsg->msg_flags |= MSG_CTRUNC;
return 0; /* XXX: return error? check spec. */
}
if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
struct timeval *tv = (struct timeval *)data;
ctv.tv_sec = tv->tv_sec;
ctv.tv_usec = tv->tv_usec;
data = &ctv;
len = sizeof(ctv);
}
if (level == SOL_SOCKET &&
(type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
int count = type == SCM_TIMESTAMPNS ? 1 : 3;
int i;
struct timespec *ts = (struct timespec *)data;
for (i = 0; i < count; i++) {
cts[i].tv_sec = ts[i].tv_sec;
cts[i].tv_nsec = ts[i].tv_nsec;
}
data = &cts;
len = sizeof(cts[0]) * count;
}
cmlen = CMSG_COMPAT_LEN(len);
if (kmsg->msg_controllen < cmlen) {
kmsg->msg_flags |= MSG_CTRUNC;
cmlen = kmsg->msg_controllen;
}
cmhdr.cmsg_level = level;
cmhdr.cmsg_type = type;
cmhdr.cmsg_len = cmlen;
if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
return -EFAULT;
if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
return -EFAULT;
cmlen = CMSG_COMPAT_SPACE(len);
if (kmsg->msg_controllen < cmlen)
cmlen = kmsg->msg_controllen;
kmsg->msg_control += cmlen;
kmsg->msg_controllen -= cmlen;
return 0;
}
void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
{
struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
int fdnum = scm->fp->count;
struct file **fp = scm->fp->fp;
int __user *cmfptr;
int err = 0, i;
if (fdnum < fdmax)
fdmax = fdnum;
for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
int new_fd;
err = security_file_receive(fp[i]);
if (err)
break;
err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
? O_CLOEXEC : 0);
if (err < 0)
break;
new_fd = err;
err = put_user(new_fd, cmfptr);
if (err) {
put_unused_fd(new_fd);
break;
}
/* Bump the usage count and install the file. */
get_file(fp[i]);
fd_install(new_fd, fp[i]);
}
if (i > 0) {
int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
err = put_user(SOL_SOCKET, &cm->cmsg_level);
if (!err)
err = put_user(SCM_RIGHTS, &cm->cmsg_type);
if (!err)
err = put_user(cmlen, &cm->cmsg_len);
if (!err) {
cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
kmsg->msg_control += cmlen;
kmsg->msg_controllen -= cmlen;
}
}
if (i < fdnum)
kmsg->msg_flags |= MSG_CTRUNC;
/*
* All of the files that fit in the message have had their
* usage counts incremented, so we just free the list.
*/
__scm_destroy(scm);
}
/*
* A struct sock_filter is architecture independent.
*/
struct compat_sock_fprog {
u16 len;
compat_uptr_t filter; /* struct sock_filter * */
};
static int do_set_attach_filter(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen)
{
struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
compat_uptr_t ptr;
u16 len;
if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
!access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
__get_user(len, &fprog32->len) ||
__get_user(ptr, &fprog32->filter) ||
__put_user(len, &kfprog->len) ||
__put_user(compat_ptr(ptr), &kfprog->filter))
return -EFAULT;
return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
sizeof(struct sock_fprog));
}
static int do_set_sock_timeout(struct socket *sock, int level,
int optname, char __user *optval, unsigned int optlen)
{
struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
struct timeval ktime;
mm_segment_t old_fs;
int err;
if (optlen < sizeof(*up))
return -EINVAL;
if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
__get_user(ktime.tv_sec, &up->tv_sec) ||
__get_user(ktime.tv_usec, &up->tv_usec))
return -EFAULT;
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
set_fs(old_fs);
return err;
}
static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen)
{
if (optname == SO_ATTACH_FILTER)
return do_set_attach_filter(sock, level, optname,
optval, optlen);
if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
return do_set_sock_timeout(sock, level, optname, optval, optlen);
return sock_setsockopt(sock, level, optname, optval, optlen);
}
asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
char __user *optval, unsigned int optlen)
{
int err;
struct socket *sock;
if ((sock = sockfd_lookup(fd, &err))!=NULL)
{
err = security_socket_setsockopt(sock,level,optname);
if (err) {
sockfd_put(sock);
return err;
}
if (level == SOL_SOCKET)
err = compat_sock_setsockopt(sock, level,
optname, optval, optlen);
else if (sock->ops->compat_setsockopt)
err = sock->ops->compat_setsockopt(sock, level,
optname, optval, optlen);
else
err = sock->ops->setsockopt(sock, level,
optname, optval, optlen);
sockfd_put(sock);
}
return err;
}
static int do_get_sock_timeout(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen)
{
struct compat_timeval __user *up;
struct timeval ktime;
mm_segment_t old_fs;
int len, err;
up = (struct compat_timeval __user *) optval;
if (get_user(len, optlen))
return -EFAULT;
if (len < sizeof(*up))
return -EINVAL;
len = sizeof(ktime);
old_fs = get_fs();
set_fs(KERNEL_DS);
err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
set_fs(old_fs);
if (!err) {
if (put_user(sizeof(*up), optlen) ||
!access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
__put_user(ktime.tv_sec, &up->tv_sec) ||
__put_user(ktime.tv_usec, &up->tv_usec))
err = -EFAULT;
}
return err;
}
static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen)
{
if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
return do_get_sock_timeout(sock, level, optname, optval, optlen);
return sock_getsockopt(sock, level, optname, optval, optlen);
}
int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
{
struct compat_timeval __user *ctv =
(struct compat_timeval __user*) userstamp;
int err = -ENOENT;
struct timeval tv;
if (!sock_flag(sk, SOCK_TIMESTAMP))
sock_enable_timestamp(sk, SOCK_TIMESTAMP);
tv = ktime_to_timeval(sk->sk_stamp);
if (tv.tv_sec == -1)
return err;
if (tv.tv_sec == 0) {
sk->sk_stamp = ktime_get_real();
tv = ktime_to_timeval(sk->sk_stamp);
}
err = 0;
if (put_user(tv.tv_sec, &ctv->tv_sec) ||
put_user(tv.tv_usec, &ctv->tv_usec))
err = -EFAULT;
return err;
}
EXPORT_SYMBOL(compat_sock_get_timestamp);
int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
{
struct compat_timespec __user *ctv =
(struct compat_timespec __user*) userstamp;
int err = -ENOENT;
struct timespec ts;
if (!sock_flag(sk, SOCK_TIMESTAMP))
sock_enable_timestamp(sk, SOCK_TIMESTAMP);
ts = ktime_to_timespec(sk->sk_stamp);
if (ts.tv_sec == -1)
return err;
if (ts.tv_sec == 0) {
sk->sk_stamp = ktime_get_real();
ts = ktime_to_timespec(sk->sk_stamp);
}
err = 0;
if (put_user(ts.tv_sec, &ctv->tv_sec) ||
put_user(ts.tv_nsec, &ctv->tv_nsec))
err = -EFAULT;
return err;
}
EXPORT_SYMBOL(compat_sock_get_timestampns);
asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
char __user *optval, int __user *optlen)
{
int err;
struct socket *sock;
if ((sock = sockfd_lookup(fd, &err))!=NULL)
{
err = security_socket_getsockopt(sock, level,
optname);
if (err) {
sockfd_put(sock);
return err;
}
if (level == SOL_SOCKET)
err = compat_sock_getsockopt(sock, level,
optname, optval, optlen);
else if (sock->ops->compat_getsockopt)
err = sock->ops->compat_getsockopt(sock, level,
optname, optval, optlen);
else
err = sock->ops->getsockopt(sock, level,
optname, optval, optlen);
sockfd_put(sock);
}
return err;
}
struct compat_group_req {
__u32 gr_interface;
struct __kernel_sockaddr_storage gr_group
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
struct compat_group_source_req {
__u32 gsr_interface;
struct __kernel_sockaddr_storage gsr_group
__attribute__ ((aligned(4)));
struct __kernel_sockaddr_storage gsr_source
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
struct compat_group_filter {
__u32 gf_interface;
struct __kernel_sockaddr_storage gf_group
__attribute__ ((aligned(4)));
__u32 gf_fmode;
__u32 gf_numsrc;
struct __kernel_sockaddr_storage gf_slist[1]
__attribute__ ((aligned(4)));
} __attribute__ ((packed));
#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
sizeof(struct __kernel_sockaddr_storage))
int compat_mc_setsockopt(struct sock *sock, int level, int optname,
char __user *optval, unsigned int optlen,
int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int))
{
char __user *koptval = optval;
int koptlen = optlen;
switch (optname) {
case MCAST_JOIN_GROUP:
case MCAST_LEAVE_GROUP:
{
struct compat_group_req __user *gr32 = (void *)optval;
struct group_req __user *kgr =
compat_alloc_user_space(sizeof(struct group_req));
u32 interface;
if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
!access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
__get_user(interface, &gr32->gr_interface) ||
__put_user(interface, &kgr->gr_interface) ||
copy_in_user(&kgr->gr_group, &gr32->gr_group,
sizeof(kgr->gr_group)))
return -EFAULT;
koptval = (char __user *)kgr;
koptlen = sizeof(struct group_req);
break;
}
case MCAST_JOIN_SOURCE_GROUP:
case MCAST_LEAVE_SOURCE_GROUP:
case MCAST_BLOCK_SOURCE:
case MCAST_UNBLOCK_SOURCE:
{
struct compat_group_source_req __user *gsr32 = (void *)optval;
struct group_source_req __user *kgsr = compat_alloc_user_space(
sizeof(struct group_source_req));
u32 interface;
if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
!access_ok(VERIFY_WRITE, kgsr,
sizeof(struct group_source_req)) ||
__get_user(interface, &gsr32->gsr_interface) ||
__put_user(interface, &kgsr->gsr_interface) ||
copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
sizeof(kgsr->gsr_group)) ||
copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
sizeof(kgsr->gsr_source)))
return -EFAULT;
koptval = (char __user *)kgsr;
koptlen = sizeof(struct group_source_req);
break;
}
case MCAST_MSFILTER:
{
struct compat_group_filter __user *gf32 = (void *)optval;
struct group_filter __user *kgf;
u32 interface, fmode, numsrc;
if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
__get_user(interface, &gf32->gf_interface) ||
__get_user(fmode, &gf32->gf_fmode) ||
__get_user(numsrc, &gf32->gf_numsrc))
return -EFAULT;
koptlen = optlen + sizeof(struct group_filter) -
sizeof(struct compat_group_filter);
if (koptlen < GROUP_FILTER_SIZE(numsrc))
return -EINVAL;
kgf = compat_alloc_user_space(koptlen);
if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
__put_user(interface, &kgf->gf_interface) ||
__put_user(fmode, &kgf->gf_fmode) ||
__put_user(numsrc, &kgf->gf_numsrc) ||
copy_in_user(&kgf->gf_group, &gf32->gf_group,
sizeof(kgf->gf_group)) ||
(numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
numsrc * sizeof(kgf->gf_slist[0]))))
return -EFAULT;
koptval = (char __user *)kgf;
break;
}
default:
break;
}
return setsockopt(sock, level, optname, koptval, koptlen);
}
EXPORT_SYMBOL(compat_mc_setsockopt);
int compat_mc_getsockopt(struct sock *sock, int level, int optname,
char __user *optval, int __user *optlen,
int (*getsockopt)(struct sock *,int,int,char __user *,int __user *))
{
struct compat_group_filter __user *gf32 = (void *)optval;
struct group_filter __user *kgf;
int __user *koptlen;
u32 interface, fmode, numsrc;
int klen, ulen, err;
if (optname != MCAST_MSFILTER)
return getsockopt(sock, level, optname, optval, optlen);
koptlen = compat_alloc_user_space(sizeof(*koptlen));
if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
__get_user(ulen, optlen))
return -EFAULT;
/* adjust len for pad */
klen = ulen + sizeof(*kgf) - sizeof(*gf32);
if (klen < GROUP_FILTER_SIZE(0))
return -EINVAL;
if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
__put_user(klen, koptlen))
return -EFAULT;
/* have to allow space for previous compat_alloc_user_space, too */
kgf = compat_alloc_user_space(klen+sizeof(*optlen));
if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
__get_user(interface, &gf32->gf_interface) ||
__get_user(fmode, &gf32->gf_fmode) ||
__get_user(numsrc, &gf32->gf_numsrc) ||
__put_user(interface, &kgf->gf_interface) ||
__put_user(fmode, &kgf->gf_fmode) ||
__put_user(numsrc, &kgf->gf_numsrc) ||
copy_in_user(&kgf->gf_group,&gf32->gf_group,sizeof(kgf->gf_group)))
return -EFAULT;
err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
if (err)
return err;
if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
__get_user(klen, koptlen))
return -EFAULT;
ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
__put_user(ulen, optlen))
return -EFAULT;
if (!access_ok(VERIFY_READ, kgf, klen) ||
!access_ok(VERIFY_WRITE, gf32, ulen) ||
__get_user(interface, &kgf->gf_interface) ||
__get_user(fmode, &kgf->gf_fmode) ||
__get_user(numsrc, &kgf->gf_numsrc) ||
__put_user(interface, &gf32->gf_interface) ||
__put_user(fmode, &gf32->gf_fmode) ||
__put_user(numsrc, &gf32->gf_numsrc))
return -EFAULT;
if (numsrc) {
int copylen;
klen -= GROUP_FILTER_SIZE(0);
copylen = numsrc * sizeof(gf32->gf_slist[0]);
if (copylen > klen)
copylen = klen;
if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
return -EFAULT;
}
return err;
}
EXPORT_SYMBOL(compat_mc_getsockopt);
/* Argument list sizes for compat_sys_socketcall */
#define AL(x) ((x) * sizeof(u32))
static unsigned char nas[20]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
AL(4),AL(5)};
#undef AL
asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
{
return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}
asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
{
return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
}
asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags)
{
return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
}
asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
unsigned flags, struct sockaddr __user *addr,
int __user *addrlen)
{
return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
}
asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned vlen, unsigned int flags,
struct compat_timespec __user *timeout)
{
int datagrams;
struct timespec ktspec;
if (timeout == NULL)
return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, NULL);
if (get_compat_timespec(&ktspec, timeout))
return -EFAULT;
datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
flags | MSG_CMSG_COMPAT, &ktspec);
if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
datagrams = -EFAULT;
return datagrams;
}
asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
{
int ret;
u32 a[6];
u32 a0, a1;
if (call < SYS_SOCKET || call > SYS_RECVMMSG)
return -EINVAL;
if (copy_from_user(a, args, nas[call]))
return -EFAULT;
a0 = a[0];
a1 = a[1];
switch (call) {
case SYS_SOCKET:
ret = sys_socket(a0, a1, a[2]);
break;
case SYS_BIND:
ret = sys_bind(a0, compat_ptr(a1), a[2]);
break;
case SYS_CONNECT:
ret = sys_connect(a0, compat_ptr(a1), a[2]);
break;
case SYS_LISTEN:
ret = sys_listen(a0, a1);
break;
case SYS_ACCEPT:
ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
break;
case SYS_GETSOCKNAME:
ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
break;
case SYS_GETPEERNAME:
ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
break;
case SYS_SOCKETPAIR:
ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
break;
case SYS_SEND:
ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
break;
case SYS_SENDTO:
ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
break;
case SYS_RECV:
ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
break;
case SYS_RECVFROM:
ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
compat_ptr(a[4]), compat_ptr(a[5]));
break;
case SYS_SHUTDOWN:
ret = sys_shutdown(a0,a1);
break;
case SYS_SETSOCKOPT:
ret = compat_sys_setsockopt(a0, a1, a[2],
compat_ptr(a[3]), a[4]);
break;
case SYS_GETSOCKOPT:
ret = compat_sys_getsockopt(a0, a1, a[2],
compat_ptr(a[3]), compat_ptr(a[4]));
break;
case SYS_SENDMSG:
ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
break;
case SYS_RECVMSG:
ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
break;
case SYS_RECVMMSG:
ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
compat_ptr(a[4]));
break;
case SYS_ACCEPT4:
ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}