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net/atm: move all compat_ioctl handling to atm/ioctl.c

Browse source 
We have two implementations of the compat_ioctl handling for ATM, the
one that we have had for ages in fs/compat_ioctl.c and the one added to
net/atm/ioctl.c by David Woodhouse. Unfortunately, both versions are
incomplete, and in practice we use a very confusing combination of the
two.

For ioctl numbers that have the same identifier on 32 and 64 bit systems,
we go directly through the compat_ioctl socket operation, for those that

differ, we do a conversion in fs/compat_ioctl.c.

This patch moves both variants into the vcc_compat_ioctl() function,
while preserving the current behaviour. It also kills off the COMPATIBLE_IOCTL
definitions that we never use here.
Doing it this way is clearly not a good solution, but I hope it is a
step into the right direction, so that someone is able to clean up this
mess for real.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2009-11-11 03:45:22 +00:00 committed by David S. Miller
parent a2116ed223
commit 805003a41c
2 changed files with 175 additions and 220 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

177
net/atm/ioctl.c
View file

@ -191,8 +191,181 @@ int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
} }
#ifdef CONFIG_COMPAT #ifdef CONFIG_COMPAT
int vcc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) /*
* FIXME:
* The compat_ioctl handling is duplicated, using both these conversion
* routines and the compat argument to the actual handlers. Both
* versions are somewhat incomplete and should be merged, e.g. by
* moving the ioctl number translation into the actual handlers and
* killing the conversion code.
*
* -arnd, November 2009
*/
#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
static struct {
unsigned int cmd32;
unsigned int cmd;
} atm_ioctl_map[] = {
{ ATM_GETLINKRATE32, ATM_GETLINKRATE },
{ ATM_GETNAMES32, ATM_GETNAMES },
{ ATM_GETTYPE32, ATM_GETTYPE },
{ ATM_GETESI32, ATM_GETESI },
{ ATM_GETADDR32, ATM_GETADDR },
{ ATM_RSTADDR32, ATM_RSTADDR },
{ ATM_ADDADDR32, ATM_ADDADDR },
{ ATM_DELADDR32, ATM_DELADDR },
{ ATM_GETCIRANGE32, ATM_GETCIRANGE },
{ ATM_SETCIRANGE32, ATM_SETCIRANGE },
{ ATM_SETESI32, ATM_SETESI },
{ ATM_SETESIF32, ATM_SETESIF },
{ ATM_GETSTAT32, ATM_GETSTAT },
{ ATM_GETSTATZ32, ATM_GETSTATZ },
{ ATM_GETLOOP32, ATM_GETLOOP },
{ ATM_SETLOOP32, ATM_SETLOOP },
{ ATM_QUERYLOOP32, ATM_QUERYLOOP },
};
#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
unsigned long arg)
{ {
return do_vcc_ioctl(sock, cmd, arg, 1); struct atm_iobuf __user *iobuf;
struct compat_atm_iobuf __user *iobuf32;
u32 data;
void __user *datap;
int len, err;
iobuf = compat_alloc_user_space(sizeof(*iobuf));
iobuf32 = compat_ptr(arg);
if (get_user(len, &iobuf32->length) ||
get_user(data, &iobuf32->buffer))
return -EFAULT;
datap = compat_ptr(data);
if (put_user(len, &iobuf->length) ||
put_user(datap, &iobuf->buffer))
return -EFAULT;
err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);
if (!err) {
if (copy_in_user(&iobuf32->length, &iobuf->length,
sizeof(int)))
err = -EFAULT;
}
return err;
}
static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
struct atmif_sioc __user *sioc;
struct compat_atmif_sioc __user *sioc32;
u32 data;
void __user *datap;
int err;
sioc = compat_alloc_user_space(sizeof(*sioc));
sioc32 = compat_ptr(arg);
if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int))
|| get_user(data, &sioc32->arg))
return -EFAULT;
datap = compat_ptr(data);
if (put_user(datap, &sioc->arg))
return -EFAULT;
err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);
if (!err) {
if (copy_in_user(&sioc32->length, &sioc->length,
sizeof(int)))
err = -EFAULT;
}
return err;
}
static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
unsigned long arg)
{
int i;
unsigned int cmd = 0;
switch (cmd32) {
case SONET_GETSTAT:
case SONET_GETSTATZ:
case SONET_GETDIAG:
case SONET_SETDIAG:
case SONET_CLRDIAG:
case SONET_SETFRAMING:
case SONET_GETFRAMING:
case SONET_GETFRSENSE:
return do_atmif_sioc(sock, cmd32, arg);
}
for (i = 0; i < NR_ATM_IOCTL; i++) {
if (cmd32 == atm_ioctl_map[i].cmd32) {
cmd = atm_ioctl_map[i].cmd;
break;
}
}
if (i == NR_ATM_IOCTL)
return -EINVAL;
switch (cmd) {
case ATM_GETNAMES:
return do_atm_iobuf(sock, cmd, arg);
case ATM_GETLINKRATE:
case ATM_GETTYPE:
case ATM_GETESI:
case ATM_GETADDR:
case ATM_RSTADDR:
case ATM_ADDADDR:
case ATM_DELADDR:
case ATM_GETCIRANGE:
case ATM_SETCIRANGE:
case ATM_SETESI:
case ATM_SETESIF:
case ATM_GETSTAT:
case ATM_GETSTATZ:
case ATM_GETLOOP:
case ATM_SETLOOP:
case ATM_QUERYLOOP:
return do_atmif_sioc(sock, cmd, arg);
}
return -EINVAL;
}
int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
int ret;
ret = do_vcc_ioctl(sock, cmd, arg, 1);
if (ret != -ENOIOCTLCMD)
return ret;
return do_atm_ioctl(sock, cmd, arg);
} }
#endif #endif

218
net/socket.c
View file

@ -100,14 +100,6 @@
#include <linux/if_tun.h> #include <linux/if_tun.h>
#include <linux/ipv6_route.h> #include <linux/ipv6_route.h>
#include <linux/route.h> #include <linux/route.h>
#include <linux/atmdev.h>
#include <linux/atmarp.h>
#include <linux/atmsvc.h>
#include <linux/atmlec.h>
#include <linux/atmclip.h>
#include <linux/atmmpc.h>
#include <linux/atm_tcp.h>
#include <linux/sonet.h>
#include <linux/sockios.h> #include <linux/sockios.h>
#include <linux/atalk.h> #include <linux/atalk.h>
@ -2917,173 +2909,6 @@ static int old_bridge_ioctl(compat_ulong_t __user *argp)
return -EINVAL; return -EINVAL;
} }
struct atmif_sioc32 {
compat_int_t number;
compat_int_t length;
compat_caddr_t arg;
};
struct atm_iobuf32 {
compat_int_t length;
compat_caddr_t buffer;
};
#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct atmif_sioc32)
#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct atm_iobuf32)
#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct atmif_sioc32)
#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct atmif_sioc32)
#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct atmif_sioc32)
#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct atmif_sioc32)
#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct atmif_sioc32)
#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct atmif_sioc32)
#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct atmif_sioc32)
#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct atmif_sioc32)
#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct atmif_sioc32)
#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct atmif_sioc32)
#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct atmif_sioc32)
#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct atmif_sioc32)
#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct atmif_sioc32)
#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct atmif_sioc32)
#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct atmif_sioc32)
static struct {
unsigned int cmd32;
unsigned int cmd;
} atm_ioctl_map[] = {
{ ATM_GETLINKRATE32, ATM_GETLINKRATE },
{ ATM_GETNAMES32, ATM_GETNAMES },
{ ATM_GETTYPE32, ATM_GETTYPE },
{ ATM_GETESI32, ATM_GETESI },
{ ATM_GETADDR32, ATM_GETADDR },
{ ATM_RSTADDR32, ATM_RSTADDR },
{ ATM_ADDADDR32, ATM_ADDADDR },
{ ATM_DELADDR32, ATM_DELADDR },
{ ATM_GETCIRANGE32, ATM_GETCIRANGE },
{ ATM_SETCIRANGE32, ATM_SETCIRANGE },
{ ATM_SETESI32, ATM_SETESI },
{ ATM_SETESIF32, ATM_SETESIF },
{ ATM_GETSTAT32, ATM_GETSTAT },
{ ATM_GETSTATZ32, ATM_GETSTATZ },
{ ATM_GETLOOP32, ATM_GETLOOP },
{ ATM_SETLOOP32, ATM_SETLOOP },
{ ATM_QUERYLOOP32, ATM_QUERYLOOP }
};
#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
static int do_atm_iobuf(struct net *net, struct socket *sock,
unsigned int cmd, unsigned long arg)
{
struct atm_iobuf __user *iobuf;
struct atm_iobuf32 __user *iobuf32;
u32 data;
void __user *datap;
int len, err;
iobuf = compat_alloc_user_space(sizeof(*iobuf));
iobuf32 = compat_ptr(arg);
if (get_user(len, &iobuf32->length) ||
get_user(data, &iobuf32->buffer))
return -EFAULT;
datap = compat_ptr(data);
if (put_user(len, &iobuf->length) ||
put_user(datap, &iobuf->buffer))
return -EFAULT;
err = sock_do_ioctl(net, sock, cmd, (unsigned long)iobuf);
if (!err) {
if (copy_in_user(&iobuf32->length, &iobuf->length,
sizeof(int)))
err = -EFAULT;
}
return err;
}
static int do_atmif_sioc(struct net *net, struct socket *sock,
unsigned int cmd, unsigned long arg)
{
struct atmif_sioc __user *sioc;
struct atmif_sioc32 __user *sioc32;
u32 data;
void __user *datap;
int err;
sioc = compat_alloc_user_space(sizeof(*sioc));
sioc32 = compat_ptr(arg);
if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) ||
get_user(data, &sioc32->arg))
return -EFAULT;
datap = compat_ptr(data);
if (put_user(datap, &sioc->arg))
return -EFAULT;
err = sock_do_ioctl(net, sock, cmd, (unsigned long) sioc);
if (!err) {
if (copy_in_user(&sioc32->length, &sioc->length,
sizeof(int)))
err = -EFAULT;
}
return err;
}
static int do_atm_ioctl(struct net *net, struct socket *sock,
unsigned int cmd32, unsigned long arg)
{
int i;
unsigned int cmd = 0;
switch (cmd32) {
case SONET_GETSTAT:
case SONET_GETSTATZ:
case SONET_GETDIAG:
case SONET_SETDIAG:
case SONET_CLRDIAG:
case SONET_SETFRAMING:
case SONET_GETFRAMING:
case SONET_GETFRSENSE:
return do_atmif_sioc(net, sock, cmd32, arg);
}
for (i = 0; i < NR_ATM_IOCTL; i++) {
if (cmd32 == atm_ioctl_map[i].cmd32) {
cmd = atm_ioctl_map[i].cmd;
break;
}
}
if (i == NR_ATM_IOCTL)
return -EINVAL;
switch (cmd) {
case ATM_GETNAMES:
return do_atm_iobuf(net, sock, cmd, arg);
case ATM_GETLINKRATE:
case ATM_GETTYPE:
case ATM_GETESI:
case ATM_GETADDR:
case ATM_RSTADDR:
case ATM_ADDADDR:
case ATM_DELADDR:
case ATM_GETCIRANGE:
case ATM_SETCIRANGE:
case ATM_SETESI:
case ATM_SETESIF:
case ATM_GETSTAT:
case ATM_GETSTATZ:
case ATM_GETLOOP:
case ATM_SETLOOP:
case ATM_QUERYLOOP:
return do_atmif_sioc(net, sock, cmd, arg);
}
return -EINVAL;
}
static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
unsigned int cmd, unsigned long arg) unsigned int cmd, unsigned long arg)
{ {
@ -3173,49 +2998,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCSMIIREG: case SIOCSMIIREG:
return dev_ifsioc(net, sock, cmd, argp); return dev_ifsioc(net, sock, cmd, argp);
case ATM_GETLINKRATE32:
case ATM_GETNAMES32:
case ATM_GETTYPE32:
case ATM_GETESI32:
case ATM_GETADDR32:
case ATM_RSTADDR32:
case ATM_ADDADDR32:
case ATM_DELADDR32:
case ATM_GETCIRANGE32:
case ATM_SETCIRANGE32:
case ATM_SETESI32:
case ATM_SETESIF32:
case ATM_GETSTAT32:
case ATM_GETSTATZ32:
case ATM_GETLOOP32:
case ATM_SETLOOP32:
case ATM_QUERYLOOP32:
case SONET_GETSTAT:
case SONET_GETSTATZ:
case SONET_GETDIAG:
case SONET_SETDIAG:
case SONET_CLRDIAG:
case SONET_SETFRAMING:
case SONET_GETFRAMING:
case SONET_GETFRSENSE:
return do_atm_ioctl(net, sock, cmd, arg);
case ATMSIGD_CTRL:
case ATMARPD_CTRL:
case ATMLEC_CTRL:
case ATMLEC_MCAST:
case ATMLEC_DATA:
case ATM_SETSC:
case SIOCSIFATMTCP:
case SIOCMKCLIP:
case ATMARP_MKIP:
case ATMARP_SETENTRY:
case ATMARP_ENCAP:
case ATMTCP_CREATE:
case ATMTCP_REMOVE:
case ATMMPC_CTRL:
case ATMMPC_DATA:
case SIOCSARP: case SIOCSARP:
case SIOCGARP: case SIOCGARP:
case SIOCDARP: case SIOCDARP: