Jan Kiszka wrote: > Cyril Wallois wrote: >> Hello Jan , >> >>> Could you verify that sizeof(struct ipv4_cmd) gives the same results in >> kernel and user space: >> >> In the kernel space the size is 56, against in the user space the size is >> 52. >> >> Where should I add the definition of the structure, in rtping.c ? >> > > Please try this patch: >
Or just this for now:
diff --git a/stack/include/ipv4_chrdev.h b/stack/include/ipv4_chrdev.h
index a96a8ad..b30b5fe 100644
--- a/stack/include/ipv4_chrdev.h
+++ b/stack/include/ipv4_chrdev.h
@@ -71,6 +71,8 @@ struct ipv4_cmd {
unsigned int timeout;
__s64 rtt;
} ping;
+
+ unsigned char __padding[64];
} args;
};
There might be more alignment issues in the other command structures. I
think you already stumbled over one in rtmac/tdma. So we have to
understand where the differences are: Please compare which
sub-structures differ in size. The padding above may solve the IOCTL
mismatch, but we may still need a full rework if field offsets mismatch
as well.
Thanks,
Jan
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