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bbfa235
(Get the code!)
Unfortunately there is no kernel API which we can use on the host to say "give me inodes and offsets which will fit into a 32 bit field". The 'getdents' syscall uses the "unsigned long" type for the d_ino and d_off fields, so on a 64-bit host these will be the same size as the ino64_t and off64_t used by 'getdents64', and you will still have the "trying to fit a quart into a pint pot" problem.
The only way to fix this is to fix the host kernel to provide the API QEMU needs for this (see discussion in the kernel thread linked to in comment #5).