On 08/05/2011 10:25 PM, TeLeMan wrote:
On Sat, Aug 6, 2011 at 04:46, Blue Swirl<blauwir...@gmail.com> wrote:
On Fri, Aug 5, 2011 at 8:09 PM, Kenneth Salerno
<kennethsale...@yahoo.com> wrote:
Hi,
I'm not sure if any defaults (build or runtime) have changed since 0.14.1, but
I can no longer get the following to work anymore for QEMU versions 0.15.0-rc2
or recent development builds:
-device e1000,netdev=mynet0 -netdev type=user,id=mynet0 ...
Works great in 0.14.1 however.
From the QEMU console, "info networking" shows the NIC e1000 and the VLAN
correctly setup, the guest (RHEL 6.1 x86_64) has its NIC recognized and networking setup,
just can't seem to communicate with the gateway (10.0.2.2). The only difference I see in
the console is cosmetic (restricted=off rather than restricted=n).
Host OS: Windows XP
Build env: i686-pc-mingw32-gcc 4.5.2, binutils 2.21.53.20110731 i386pe
Runtime env: Cygwin 1.7.9 2011-03-29, SDL 1.2.14, mingw32-glib 2.28.1-1,
mingw32-gettext 0.18.1-2
Guest OS: RHEL 6.1
Is it just me?
No, this is fallout from glib use:
http://lists.nongnu.org/archive/html/qemu-devel/2011-08/msg00134.html
The fix is to rewrite structures without using GCC bit fields.
-mms-bitfields affects all byte-alignments in a structure. For example,
struct s
{
uint8_t a;
uint32_t b;
} __attribute__((packed));
sizeof(s) is 5 without -mms-bitfields but sizeof(s) is 8 with -mms-bitfields.
If you can identify the offending structs, you can do:
#pragma pack(push,1)
struct s
{
uint8_t a;
uint32_t b;
} __attribute__((packed));
#pragma pack(pop)
Regards,
Anthony Liguori
