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linux-user: add SIOCADDRT/SIOCDELRT support 

This allows to pass the device name.

You can test this with the "route" command.

WITHOUT this patch:

$ sudo route add -net default gw 10.0.3.1 eth0
SIOCADDRT: Bad address
$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Ifa
10.0.3.0        0.0.0.0         255.255.255.0   U         0 0          0 eth

WITH this patch:

$ sudo route add -net default gw 10.0.3.1 eth0
$ netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Ifa
0.0.0.0         10.0.3.1        0.0.0.0         UG        0 0          0 eth
10.0.3.0        0.0.0.0         255.255.255.0   U         0 0          0 eth

Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Laurent Vivier 2013-07-02 14:04:12 +01:00 committed by Riku Voipio
parent 463d8e7393
commit 7ff7b66618
2 changed files with 68 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
linux-user/ioctls.h
View File

@ -88,8 +88,6 @@
#endif
IOCTL(SIOCATMARK, 0, TYPE_NULL)
IOCTL(SIOCADDRT, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtentry)))
IOCTL(SIOCDELRT, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtentry)))
IOCTL(SIOCGIFNAME, IOC_RW, MK_PTR(TYPE_INT))
IOCTL(SIOCGIFFLAGS, IOC_W | IOC_R, MK_PTR(MK_STRUCT(STRUCT_short_ifreq)))
IOCTL(SIOCSIFFLAGS, IOC_W, MK_PTR(MK_STRUCT(STRUCT_short_ifreq)))
@ -379,3 +377,7 @@
MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
IOCTL_SPECIAL(DM_DEV_SET_GEOMETRY, IOC_RW, do_ioctl_dm,
MK_PTR(MK_STRUCT(STRUCT_dm_ioctl)))
IOCTL_SPECIAL(SIOCADDRT, IOC_W, do_ioctl_rt,
MK_PTR(MK_STRUCT(STRUCT_rtentry)))
IOCTL_SPECIAL(SIOCDELRT, IOC_W, do_ioctl_rt,
MK_PTR(MK_STRUCT(STRUCT_rtentry)))

64
linux-user/syscall.c
View File

@ -105,6 +105,7 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#include <linux/vt.h>
#include <linux/dm-ioctl.h>
#include <linux/reboot.h>
#include <linux/route.h>
#include "linux_loop.h"
#include "cpu-uname.h"
@ -3551,6 +3552,69 @@ out:
return ret;
}
static abi_long do_ioctl_rt(const IOCTLEntry *ie, uint8_t *buf_temp,
int fd, abi_long cmd, abi_long arg)
{
const argtype *arg_type = ie->arg_type;
const StructEntry *se;
const argtype *field_types;
const int *dst_offsets, *src_offsets;
int target_size;
void *argptr;
abi_ulong *target_rt_dev_ptr;
unsigned long *host_rt_dev_ptr;
abi_long ret;
int i;
assert(ie->access == IOC_W);
assert(*arg_type == TYPE_PTR);
arg_type++;
assert(*arg_type == TYPE_STRUCT);
target_size = thunk_type_size(arg_type, 0);
argptr = lock_user(VERIFY_READ, arg, target_size, 1);
if (!argptr) {
return -TARGET_EFAULT;
}
arg_type++;
assert(*arg_type == (int)STRUCT_rtentry);
se = struct_entries + *arg_type++;
assert(se->convert[0] == NULL);
/* convert struct here to be able to catch rt_dev string */
field_types = se->field_types;
dst_offsets = se->field_offsets[THUNK_HOST];
src_offsets = se->field_offsets[THUNK_TARGET];
for (i = 0; i < se->nb_fields; i++) {
if (dst_offsets[i] == offsetof(struct rtentry, rt_dev)) {
assert(*field_types == TYPE_PTRVOID);
target_rt_dev_ptr = (abi_ulong *)(argptr + src_offsets[i]);
host_rt_dev_ptr = (unsigned long *)(buf_temp + dst_offsets[i]);
if (*target_rt_dev_ptr != 0) {
*host_rt_dev_ptr = (unsigned long)lock_user_string(
tswapal(*target_rt_dev_ptr));
if (!*host_rt_dev_ptr) {
unlock_user(argptr, arg, 0);
return -TARGET_EFAULT;
}
} else {
*host_rt_dev_ptr = 0;
}
field_types++;
continue;
}
field_types = thunk_convert(buf_temp + dst_offsets[i],
argptr + src_offsets[i],
field_types, THUNK_HOST);
}
unlock_user(argptr, arg, 0);
ret = get_errno(ioctl(fd, ie->host_cmd, buf_temp));
if (*host_rt_dev_ptr != 0) {
unlock_user((void *)*host_rt_dev_ptr,
*target_rt_dev_ptr, 0);
}
return ret;
}
static IOCTLEntry ioctl_entries[] = {
#define IOCTL(cmd, access, ...) \
{ TARGET_ ## cmd, cmd, #cmd, access, 0, { __VA_ARGS__ } },