devinet - ioctl, inet_set_ifa

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Hi there, I am trying to make address change on a device from kernel
module.
I saw that there us devinet_ioctl function and I am trying to use it but
there is a copy_from_user(..) call which is no appropriate for me
because it is in kernel space.
Next i saw inet_set_ifa which is exactly what i need but than this is
not exported in system map and i cannot invoke it from module. In
devinet.c are many usefull functions
(
inet_set_ifa
inet_free_ifa
....
)but they cannot by directly called - Why ?
Thnak You

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fn:Nickolay Dokovsky
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